WiFi Troubleshooting Guide: Fix Every WiFi Problem (2026)
WiFi not working? Start with these four steps: (1) Restart your router and modem — unplug both for 30 seconds, plug modem first, wait 60 seconds, then plug router back in. (2) Forget the WiFi network on your device and reconnect. (3) On Windows, run ipconfig /flushdns and netsh int ip reset in an elevated Command Prompt, then restart. (4) Update your WiFi adapter driver in Device Manager. If your WiFi keeps disconnecting, slow WiFi is the problem, or you cannot connect at all — every fix for every scenario is covered below.
WiFi troubleshooting is one of the most searched tech topics in the world — and for good reason. WiFi not working, WiFi keeps disconnecting, slow WiFi, and "connected but no internet" are problems that millions of people face every day on Windows and Mac. The frustrating part is that a WiFi problem can originate from the router, from your device's network adapter, from Windows or macOS settings, from your ISP, or from simple interference in the air around you.
This complete WiFi troubleshooting guide covers every cause and every fix, organized from the quickest solutions to the more advanced techniques. Whether you are on Windows 10, Windows 11, or a Mac, you will find the exact steps you need to get your WiFi working again in 2026.
WiFi Not Connecting — Quick Fixes to Try First
Before diving into advanced WiFi troubleshooting, these fast steps resolve the vast majority of WiFi not working situations. Work through them in order — most people find their fix within the first three steps.
Check Airplane Mode and WiFi Toggle
Windows & MacThe most overlooked WiFi fix — confirm that WiFi is actually enabled on your device and that Airplane Mode is off.
- Windows 11: Click the network icon in the taskbar (bottom right) › confirm WiFi is toggled On and Airplane Mode is Off
- Windows 10: Click the WiFi icon in the system tray › ensure the WiFi tile is highlighted blue (enabled)
- Mac: Click the WiFi icon in the menu bar › confirm WiFi is On
- On laptops, also check for a physical WiFi button or function key (e.g.,
Fn + F2) that can disable WiFi
Move Closer to the Router
Windows & MacWiFi signal drops sharply with distance and through walls. Before any software fix, confirm your device can actually receive a usable WiFi signal.
- Move your laptop or device to within 3 metres (10 feet) of the router
- Check the WiFi signal bars — if they are low even when close, the router or WiFi adapter may be the issue
- Test whether the WiFi connects or improves from that short distance
- If it works close but not from your normal spot, the problem is signal strength — see the Router Placement section below
Restart Your Computer
Windows & MacA full restart — not Sleep or Hibernate — clears the WiFi adapter state, resets TCP/IP connections, and flushes the DNS cache automatically. It resolves a large percentage of temporary WiFi not working situations.
- Windows: Click Start › Power › Restart (not Shutdown — on Windows 10/11 with Fast Startup, Shutdown does not fully reset the network stack)
- Mac: Click Apple menu › Restart
- After restarting, wait 60 seconds before testing WiFi — the adapter needs time to initialize
How to Properly Restart Your Router and Modem
A router restart is the single most effective WiFi troubleshooting step. Most routers accumulate memory leaks, connection table overflows, and DHCP conflicts over days or weeks of continuous operation. A proper power-cycle — not just pressing the reset button — clears all of this. Here is the correct sequence for restarting a router/modem setup to fix WiFi not working.
Unplug Both Devices Completely from Power
Unplug your modem and your router from the wall outlet (not just power them off with the button). If your modem and router are a combined unit, unplug that single device. Do not use the reset pinhole button — that factory-resets the device and erases your WiFi settings.
Wait a Full 30 Seconds
This is the step most people skip. The capacitors in the router need time to fully discharge so the device boots completely fresh. A 5-second wait is not enough. Time 30 full seconds before plugging anything back in.
Plug the Modem In First
If you have a separate modem and router, always plug the modem in first. The modem needs to establish its connection to your ISP before the router can distribute that connection via WiFi. Plug in the modem and wait for its indicator lights to stabilize — typically 60 seconds.
Plug the Router In and Wait
Once the modem lights are solid, plug the router back in. Wait another 60 seconds for the router to fully boot and begin broadcasting its WiFi network. The WiFi indicator light on the router should become solid or blinking steadily.
Test WiFi on Your Device
On your computer or phone, check if the WiFi network appears. Select your network, enter the WiFi password if prompted, and test internet access by opening a browser. If the network appears but you cannot connect, proceed to the Forget & Reconnect step below.
Forget and Reconnect to Your WiFi Network
When WiFi was working previously but suddenly stopped — or when you changed your WiFi password — the saved network profile on your device often becomes corrupted or outdated. Forgetting the network and reconnecting fresh is one of the most reliable WiFi troubleshooting steps. This also resolves "wrong password" errors that appear even when you are entering the correct WiFi password.
For a full guide on connecting to WiFi after forgetting a network, see our article: How to Connect to WiFi on Windows and Mac.
Forget and Reconnect on Windows 11
Open WiFi Settings
Press Win + I to open Settings. Navigate to Network & internet › WiFi › Manage known networks.
Forget the Network
Find your WiFi network name in the list. Click on it, then click Forget. The network profile, including its saved password, is removed from your device.
Reconnect
Click the WiFi icon in the taskbar. Your network should appear in the list. Click it, select Connect, enter your WiFi password, and click Next. Windows will reconnect and save the new profile.
Forget and Reconnect on Windows 10
Go to Settings › Network & Internet › WiFi › Manage known networks. Click your network name, click Forget, then reconnect from the taskbar WiFi menu by selecting the network and entering your WiFi password.
Forget and Reconnect on Mac
Go to System Settings (or System Preferences on older macOS) › WiFi. Click the network you want to forget. Select Forget This Network and confirm. Then click the WiFi menu bar icon, select your network from the list, and enter your WiFi password when prompted.
Update Your WiFi Adapter Driver (Windows)
An outdated, corrupted, or incompatible WiFi adapter driver is one of the leading causes of WiFi not working, WiFi keeps disconnecting, and slow WiFi on Windows 10 and Windows 11. After a Windows update, drivers sometimes become mismatched, causing WiFi instability that persists even after restarting the router and reconnecting. Updating the WiFi adapter driver often resolves these issues completely.
For a full walkthrough of driver updates beyond WiFi, see our complete guide to updating drivers on Windows.
Update WiFi Driver via Device Manager
Windows 10 & 11Device Manager lets you update the WiFi adapter driver directly from Windows, searching either online or using a downloaded driver package.
- Press
Win + Xand select Device Manager - Expand the Network Adapters section by clicking the arrow
- Right-click your WiFi adapter (it usually includes "Wireless", "WiFi", or "802.11" in the name)
- Select Update driver
- Choose Search automatically for drivers — Windows will find and install the latest available driver
- If Windows says the driver is already up to date but WiFi is still not working, choose Browse my computer for drivers after downloading the driver from your laptop manufacturer's support website
- Restart your computer after the driver update completes
Roll Back the WiFi Driver (After a Windows Update)
Windows 10 & 11If WiFi stopped working immediately after a Windows update, the new driver may be causing the issue. Rolling back to the previous version often resolves it instantly.
- Open Device Manager (Win + X › Device Manager)
- Expand Network Adapters and double-click your WiFi adapter
- Go to the Driver tab
- Click Roll Back Driver (grayed out if there is no previous driver to roll back to)
- Select a reason and click Yes to confirm
- Restart your computer after the rollback completes
Flush DNS and Reset TCP/IP on Windows
When your WiFi shows as connected but websites will not load — or you see "WiFi connected, no internet" — the problem is often a corrupted DNS cache or a misconfigured TCP/IP stack. Flushing the DNS cache clears stored bad address lookups. Resetting TCP/IP restores the network configuration to Windows defaults. These are two of the most powerful WiFi troubleshooting commands available and they are completely safe to run.
Win + S, type cmd, right-click Command Prompt in the results, and select Run as administrator. Click Yes when prompted by UAC.
Run each command below one at a time, pressing Enter after each. Wait for the confirmation message before typing the next command.
Step 1 — Flush the DNS Cache
You should see: "Successfully flushed the DNS Resolver Cache." This clears all cached DNS entries, including corrupt ones that cause "page not found" errors and WiFi connected but no internet problems.
Step 2 — Release and Renew Your IP Address
This forces your computer to release its current IP address from the router and request a fresh one. It resolves IP address conflicts that can prevent WiFi from working even when your password is correct.
Step 3 — Reset TCP/IP
Resets the TCP/IP protocol stack to a clean state, removing any configuration corruption. You will see several "Resetting..." messages — this is normal.
Step 4 — Reset Winsock
Resets the Windows Sockets configuration. This resolves many "connected but no internet" problems that persist even after the above steps. After running this command, restart your computer — the Winsock reset requires a restart to take effect.
Optional — Change to Google DNS or Cloudflare DNS
If your ISP's DNS servers are unreliable, switching to a faster public DNS can resolve intermittent WiFi and slow-loading websites. In Windows: go to Settings › Network & Internet › WiFi › Hardware properties › DNS server assignment › Edit. Switch to Manual and enter:
- Google DNS:
8.8.8.8(preferred) and8.8.4.4(alternate) - Cloudflare DNS:
1.1.1.1(preferred) and1.0.0.1(alternate)
Windows WiFi Troubleshooter
Windows has a built-in WiFi troubleshooter that automatically detects and fixes common WiFi not working problems. It checks adapter settings, driver status, IP configuration, and DNS, and applies fixes automatically when it finds an issue. It is worth running as part of any WiFi troubleshooting routine on Windows 10 and Windows 11.
Running the Troubleshooter on Windows 11
Open Settings › System › Troubleshoot
Press Win + I to open Settings. Navigate to System › Troubleshoot › Other troubleshooters.
Run Internet Connections
Find Internet Connections in the list and click Run. The troubleshooter will scan your WiFi adapter, IP settings, and connection status.
Apply the Suggested Fixes
The troubleshooter will report what it found and offer to apply fixes automatically. Click Apply this fix for any suggested repair. After it completes, test your WiFi connection.
Running the Troubleshooter on Windows 10
Go to Settings › Update & Security › Troubleshoot › Additional troubleshooters. Click Internet Connections, then Run the troubleshooter. You can also access it by right-clicking the WiFi icon in the system tray and selecting Troubleshoot problems.
For reference, Microsoft's official WiFi troubleshooting documentation is available at support.microsoft.com.
Mac WiFi Diagnostics and Fixes
macOS has its own set of WiFi troubleshooting tools, including a built-in Wireless Diagnostics utility. When WiFi is not working on a Mac, the approach differs from Windows but the underlying causes are often the same: corrupted network profile, DNS issues, and network preference file corruption.
Apple's official WiFi troubleshooting guidance is available at support.apple.com.
Use macOS Wireless Diagnostics
macOS (All versions)Wireless Diagnostics is a built-in Mac tool that scans your WiFi environment, checks your connection, and reports specific problems with channel congestion, signal strength, and connection stability.
- Hold the
Optionkey and click the WiFi icon in the menu bar - Select Open Wireless Diagnostics
- Click Continue — the tool will scan your WiFi environment and report findings
- For detailed information, go to Window › Scan in the menu bar while Wireless Diagnostics is open — this shows all nearby networks, their channels, and signal strength to help identify interference
- The Summary report shows detected problems and recommendations
Flush DNS Cache on Mac
macOS (All versions)Flushing the DNS cache on Mac resolves "WiFi connected but no internet" problems where websites fail to load despite having a WiFi connection.
- Open Terminal (Applications › Utilities › Terminal, or use Spotlight:
Cmd + Space, type Terminal) - Type the command below and press Enter
- Enter your Mac password when prompted (the cursor will not move while typing — this is normal)
- You will hear a sound effect confirming the flush was successful
Delete Mac Network Preference Files
macOS (Advanced Fix)Corrupted network preference files can cause persistent WiFi not working issues on Mac that survive reboots and network reconnections. Deleting them forces macOS to rebuild the network configuration from scratch.
- Open Finder and press
Cmd + Shift + Gto open "Go to Folder" - Type:
/Library/Preferences/SystemConfiguration/and press Enter - Move the following files to your Desktop (as a backup, not to Trash):
com.apple.network.identification.plist,com.apple.wifi.message-tracer.plist,NetworkInterfaces.plist,preferences.plist - Restart your Mac — macOS will recreate these files with fresh defaults
- Test WiFi — if it now works, the original files were corrupted. You can delete the backup copies from your Desktop.
WiFi Keeps Disconnecting — How to Fix It
WiFi that keeps disconnecting every few minutes is one of the most frustrating WiFi problems. Unlike WiFi that simply will not connect at all, intermittent disconnection is harder to diagnose because the problem seems to fix itself temporarily. The most common causes on Windows are power management settings and driver issues. On Mac, it is often related to roaming between the 2.4 GHz and 5 GHz bands or an interference issue.
Fix 1: Disable Power Management for the WiFi Adapter (Windows)
By default, Windows is allowed to turn off the WiFi adapter to save power. This is the most common reason WiFi keeps disconnecting on Windows laptops, especially when the computer has been idle for a few minutes.
Open Device Manager
Press Win + X and select Device Manager.
Open WiFi Adapter Properties
Expand Network Adapters, right-click your WiFi adapter, and select Properties.
Disable Power Management
Go to the Power Management tab. Uncheck the box that says "Allow the computer to turn off this device to save power". Click OK.
Disable Selective Suspend (Optional)
Go to Control Panel › Power Options › Change plan settings › Change advanced power settings. Expand Wireless Adapter Settings › Power Saving Mode and change it to Maximum Performance.
Fix 2: Set WiFi Network to Private (Windows)
If Windows detects your WiFi network as "Public", certain network features are restricted and the connection may drop more frequently. Setting it to "Private" can resolve WiFi keeps disconnecting issues.
Go to Settings › Network & Internet › WiFi › click your connected network › under Network profile type, select Private network.
Fix 3: Update Router Firmware
Router firmware updates fix bugs that cause dropped connections, improve stability, and patch security vulnerabilities. Log into your router's admin panel (usually at 192.168.1.1 or 192.168.0.1 in your browser), navigate to the firmware update section, and install any available updates. Consult your router manufacturer's support site for specific instructions.
Fix 4: Change the WiFi Channel
If many neighboring WiFi networks are using the same channel as yours, interference causes frequent disconnections. For the 2.4 GHz band, channels 1, 6, and 11 are the only non-overlapping options — choose whichever is least used in your area. For the 5 GHz band, interference is much less common since many more channels are available. This setting is in your router's admin panel under Wireless or WiFi settings.
Slow WiFi Speed Fix
Slow WiFi is a different problem from WiFi not connecting — your device has a WiFi connection but speeds are much lower than expected. Before starting WiFi troubleshooting for slow speed, first test your internet speed via a wired Ethernet connection to establish a baseline. If the wired speed matches your internet plan, the slowdown is a WiFi issue. If even the wired connection is slow, the problem is your ISP and no amount of WiFi troubleshooting will help.
Switch from 2.4 GHz to 5 GHz Band
Most EffectiveThe 2.4 GHz band is used by virtually every WiFi device, microwave oven, baby monitor, and Bluetooth device in range. The congestion can drastically reduce WiFi speeds. If your router broadcasts both 2.4 GHz and 5 GHz networks (most modern routers do), connecting to the 5 GHz band delivers significantly faster WiFi speeds for devices within range.
- Look for two WiFi network names from your router — often distinguished by "2G" vs "5G" or "_2.4" vs "_5" in the name
- If your router uses the same name for both bands (band steering), you can disable band steering in the router admin panel to see them separately
- Connect to the 5 GHz network — expect 2x to 4x faster WiFi speeds for devices within 10 metres of the router
- If there is no 5 GHz option, your router may be older — see the 2.4 GHz vs 5 GHz section below
Check for Background Bandwidth Consumption
Common CauseOther devices on your network — or background processes on your own computer — may be consuming bandwidth without you realizing it, causing slow WiFi for everything else.
- Windows: Press
Ctrl + Shift + Escto open Task Manager › go to the Performance tab › click Open Resource Monitor › check the Network tab to see which processes are using bandwidth - Mac: Open Activity Monitor (Applications › Utilities) › click the Network tab to see per-process bandwidth usage
- Check other devices on your network — someone streaming 4K video or downloading large files can saturate a shared WiFi connection
- Check if Windows Update is running in the background — it downloads updates silently and can consume significant bandwidth
Reposition Your Router
Physical FixRouter placement has a massive impact on WiFi speed. A poorly positioned router can halve your effective WiFi speed even when you have a strong-looking signal bar count.
- Place the router in a central location in your home or office, not in a corner or closet
- Elevate the router — a higher position (shelf or wall mount) improves coverage
- Keep the router away from microwaves, cordless phones, baby monitors, and other 2.4 GHz devices
- Keep the router away from metal objects and thick concrete walls, which block WiFi signals
- For large homes or offices, consider a WiFi mesh system (such as Google Nest WiFi, Eero, or TP-Link Deco) to eliminate dead zones
2.4 GHz vs 5 GHz WiFi — Which Should You Use?
Understanding the difference between the 2.4 GHz and 5 GHz WiFi bands is essential to getting the best WiFi performance from your router. Most modern routers are dual-band, broadcasting both frequencies simultaneously. Choosing the right band for each device can significantly improve WiFi speed and reduce the WiFi keeps disconnecting problem.
| Feature | 2.4 GHz WiFi | 5 GHz WiFi |
|---|---|---|
| Range | Longer range — travels further through walls | Shorter range — drops faster with distance and obstacles |
| Speed | Slower — typically up to 600 Mbps maximum | Faster — up to 1300 Mbps on most home routers |
| Interference | High — shared with microwaves, Bluetooth, baby monitors | Low — fewer competing devices and more available channels |
| Wall penetration | Better — passes through thick walls and floors more effectively | Weaker — struggles through thick concrete or brick walls |
| Best for | Devices far from the router, smart home devices, IoT sensors | Streaming, gaming, video calls — any device close to the router |
| WiFi 6 (802.11ax) | Supported — improved efficiency in congested environments | Supported — maximum performance for compatible devices |
Router Placement Tips for Maximum WiFi Coverage
WiFi signal strength is the foundation of everything — even perfect WiFi troubleshooting settings will not help if your router is physically located in a position that limits coverage. These router placement principles apply to any brand and any WiFi standard.
- Central location: Place your router in the centre of the area you want to cover, not at one end of the building. WiFi broadcasts outward in all directions — a central position minimizes dead zones.
- Elevated position: Mount the router on a shelf or on top of a bookcase rather than on the floor. WiFi signals travel downward more easily than upward.
- Away from microwaves: Microwave ovens operate at 2.4 GHz and cause severe interference with 2.4 GHz WiFi. Keep at least 3 metres of distance between your router and any microwave.
- Away from cordless phones: Older cordless landline phones also use 2.4 GHz. If you have both WiFi and a cordless phone, keep them apart.
- Away from metal objects: Metal surfaces reflect and absorb WiFi signals. Do not place the router inside a metal cabinet, behind a TV, or near large metal appliances.
- Keep antennas vertical: If your router has external antennas, orient them vertically (pointing straight up) for maximum horizontal coverage.
- Avoid fish tanks and mirrors: Water absorbs WiFi signals. Large mirrors also reflect and scatter WiFi, reducing effective coverage.
- For multi-floor coverage: Place the router on the upper floor to serve lower floors, since WiFi travels downward more effectively. Alternatively, use a WiFi mesh system with nodes on each floor.
WiFi Still Not Working? Let IT Cares Fix It
WiFi still not working after trying everything in this guide? IT Cares offers remote and on-site tech support across Canada — get your WiFi fixed today. Our certified technicians diagnose and resolve WiFi not connecting, slow WiFi, and WiFi keeps disconnecting on Windows and Mac. Available 7 days a week.
Frequently Asked Questions — WiFi Troubleshooting
If your WiFi password is correct but you still cannot connect, the most common causes are a corrupted network profile saved on your device, a router that needs to be restarted, an IP address conflict on the network, or a WiFi adapter driver issue on Windows. Start by forgetting the WiFi network on your device and reconnecting from scratch. Then restart your router using the power-cycle method (unplug 30 seconds, plug modem first, then router). If that does not resolve the WiFi not connecting problem, run ipconfig /flushdns and netsh int ip reset in an elevated Command Prompt on Windows, then restart your computer.
WiFi that keeps disconnecting is most commonly caused by Windows power management turning off the WiFi adapter to conserve battery — this is the default setting on most laptops. The fix is to open Device Manager, find your WiFi adapter under Network Adapters, go to Properties › Power Management, and uncheck "Allow the computer to turn off this device to save power". Other causes include an outdated or corrupted WiFi adapter driver (update it in Device Manager), channel interference from neighboring WiFi networks (change the router channel), a weak WiFi signal, or a router that needs a firmware update. On Mac, WiFi keeps disconnecting is often caused by the Mac switching between 2.4 GHz and 5 GHz bands — you can pin the Mac to one band by connecting to the specific band's network name.
To fix slow WiFi speed: first confirm whether the slow speed is a WiFi problem or an ISP problem by running a speed test on a wired Ethernet connection. If wired speed matches your plan, then it is a WiFi problem. The most effective fixes are: (1) Switch from the 2.4 GHz WiFi band to the 5 GHz band — this alone often doubles or triples WiFi speed for devices near the router. (2) Move closer to the router or remove physical obstacles. (3) Change the WiFi channel in your router settings to one that is less congested — use channels 1, 6, or 11 on 2.4 GHz. (4) Update your WiFi adapter driver. (5) Check for other devices on the network consuming bandwidth. (6) Restart your router to clear its connection table. If slow WiFi persists on all devices even after these steps, the problem may be with your ISP connection speed rather than WiFi.
The 2.4 GHz WiFi band provides longer range and better penetration through walls, but offers slower maximum speeds (generally up to 600 Mbps on home routers) and is much more prone to interference since nearly every WiFi device, microwave oven, baby monitor, and Bluetooth device operates on the same frequency. The 5 GHz WiFi band is significantly faster (up to 1300 Mbps on most home dual-band routers), much less congested with far more available channels, but has shorter range and the signal weakens more quickly through thick walls and floors. The rule of thumb: use 5 GHz for devices within 10 metres (30 feet) of the router where speed matters — laptops, streaming devices, gaming consoles. Use 2.4 GHz for devices further away or in different rooms, and for smart home devices that do not need high speed.
"WiFi connected but no internet access" means your device successfully connected to the router (local network) but the router cannot reach the internet. On Windows, this appears as "Connected, No Internet" in the taskbar. The most effective WiFi troubleshooting steps for this specific problem are: (1) Restart your router and modem using the full power-cycle method (unplug 30 seconds). (2) Run ipconfig /flushdns in Command Prompt as Administrator. (3) Run netsh winsock reset and restart. (4) Change your DNS server to Google DNS (8.8.8.8) or Cloudflare (1.1.1.1) in your network adapter settings. (5) If all devices on the network show the same problem, contact your internet service provider — the issue is outside your network entirely. If only one device shows "no internet", the problem is on that specific device and not the router.
Comments
The power management fix for the WiFi adapter completely solved my problem. My laptop had been disconnecting from WiFi every 15 minutes for weeks and nothing was working. Unchecking that one box in Device Manager and it has not dropped once since. Wish I had found this WiFi troubleshooting guide sooner — thank you!
Running the DNS flush and Winsock reset commands fixed my "connected but no internet" issue on Windows 11. I had tried everything else I could find but those commands are what actually did it. The step-by-step format makes it really easy to follow even without technical experience. Very thorough WiFi guide.
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