The Problem

Windows Update keeps failing and rolling back with a code like 0x80070643, 0x800f0922, 0x80073712, 0x80070002, or 0x8024a105. The cause is usually corrupt update files, too little free space, or a stuck component—rarely anything you can't fix in a few steps.

Update never finishes or freezes at a percentage? See Windows Update stuck. A patch installed and broke things? See fix Windows 11 after a bad update.

Quick Fixes (Try These First)

Free Up Disk Space

Feature updates need 20 GB+ free. If your C: drive is nearly full, the update fails with space-related codes. Clear room: free up disk space on a full C: drive.

Run the Update Troubleshooter

Settings → System → Troubleshoot → Other troubleshooters → Windows Update → Run. Reboot and retry.

The Fix: Step-by-Step

Step 1: Reset the Windows Update Components

This clears the corrupt cache behind most update errors. In Terminal (Admin), run these lines in order:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Reboot and check for updates again.

Step 2: Repair the Component Store

A damaged component store throws 0x800f0922 and 0x80073712:

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

Step 3: Handle the WinRE Servicing Error (0x80070643)

The recent 0x80070643 "security update" failure usually comes from the Recovery Environment partition being too small, not a real problem with Windows itself.

First, just retry after Steps 1-2—Microsoft has patched many cases automatically.
If it persists, this specific error does not affect normal Windows updates and is safe to leave; a later cumulative update typically clears it.

Step 4: Install the Update Manually

Note the KB number that's failing (shown in Settings → Windows Update → Update history).
Go to the Microsoft Update Catalog (catalog.update.microsoft.com), search the KB, and download the package matching your version.
Run the installer, then reboot.

Step 5: Use the Installation Assistant or Media

For a stubborn feature update, the Windows 11 Installation Assistant or a bootable USB (choose Keep personal files and apps) reinstalls the update cleanly without wiping data.

Still Failing?

Third-party antivirus can block updates—pause it and retry.
Persistent corruption may need an in-place repair install; the clean install guide covers the "keep files" repair path.

How to Fix Common Windows 11 Update Errors