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Likely fix

Fix: Windows Update keeps failing

Repeated Windows Update failures usually come from low disk space, corrupted update cache, driver conflicts, pending restarts, damaged system files, or unsupported hardware.

Quick answer

Restart, free disk space, run the Windows Update troubleshooter, disconnect unnecessary devices, then retry.

Important warning

If the same update fails many times, do not keep retrying blindly. The error code usually points to the real cause.

Try this

  1. 1 Restart the PC.
  2. 2 Free up disk space on the system drive.
  3. 3 Disconnect unnecessary USB devices and docks.
  4. 4 Run Windows Update troubleshooter.
  5. 5 Check update history for the error code.
  6. 6 Install driver updates from your PC maker if needed.
  7. 7 Run system file repair tools if you are comfortable doing so.
  8. 8 Try installing the update again.

Common causes

Low disk space.

Pending restart.

Corrupted update cache.

Driver conflict.

System file corruption.

Unsupported device or hardware.

What to check next

  • Check free disk space.
  • Check update error code.
  • Check pending restart.
  • Check driver updates.
  • Check whether external USB devices are connected.

FAQ

Why does Windows Update keep failing?

Common causes include low disk space, corrupted update files, driver conflicts, pending restarts, or damaged system files.

Where do I find Windows Update error codes?

Open Settings → Windows Update → Update history and look for failed updates.

Can USB devices cause update problems?

Sometimes. Disconnect unnecessary USB devices, docks, and external drives while updating.

Related fixes

Fix: Windows Update downloading is stuck

Windows Update downloads can appear stuck because the connection is slow, update servers are busy, the update cache is broken, or Windows Update services are frozen.

Fix: Windows Update installing is stuck

Windows Update installation can look stuck while it is still working, especially on older PCs, slow drives, or large feature updates.

Fix: Windows says undoing changes after update

Undoing changes means Windows tried to install an update but failed and is rolling back to the previous state.

Fix: Windows is slow after update

Windows can be slow after an update because it is finishing background tasks, rebuilding indexes, installing drivers, scanning files, or waiting for another restart.

Fix: Windows stuck on getting Windows ready or restarting

Windows can stay on Getting Windows ready or Restarting while finishing update tasks, but it can also get stuck because of update failure or disk problems.