How to Fix Windows Error 0x80240034 — Windows Update Error [2026]

This error typically occurs when corrupted update components. Below you'll find 5 proven fixes to resolve it.

What Causes Windows Error 0x80240034?

Windows error 0x80240034 (Windows Update Error) can be triggered by several issues:

Win + I > System > Troubleshoot > Other troubleshooters > Windows Update > Run.

Open CMD as Admin:
net stop wuauserv
net stop bits
del /f /s /q C:\Windows\SoftwareDistribution\*
net start wuauserv
net start bits

Win + I > System > Storage > Temporary files > delete everything. You need at least 10GB free for updates.

CMD as Admin:
DISM /Online /Cleanup-Image /RestoreHealth
Then: sfc /scannow
Restart and retry update.

Visit catalog.update.microsoft.com, search for the KB number of the failed update, download and install it manually.

IT Cares can diagnose and fix this error remotely — usually in under 30 minutes.

Call (581) 398-1270 Book Remote Session

Usually corrupted update cache or not enough disk space. Clearing the SoftwareDistribution folder fixes most cases.

You can temporarily, but security updates should eventually be installed. Try installing it manually from Microsoft's update catalog.

No. Resetting only affects the update download cache. Your files, apps, and settings are untouched.

At least 10GB free, ideally 20GB. Major feature updates can require 20-30GB temporarily.

Not recommended. Security patches protect against vulnerabilities. Instead, fix the update error so updates install properly.