Large updates can genuinely take a long time, so wait at least an hour if the drive light is still active. If an update keeps failing, the Windows Update troubleshooter, freeing disk space, and resetting the update cache usually fix it.
Common causes
Large update in progress
Feature updates can take a long time, especially on older computers or hard drives.
Not enough disk space
Updates fail when the drive is nearly full.
Corrupted update cache
Partially downloaded update files can cause repeated failures.
Incompatible software or drivers
Some security software and old drivers block updates.
How to fix it, step by step
- 1
Wait if there's activity
If the percentage or drive light is still changing, give it time. Turning it off mid-update can cause damage.
- 2
Free up disk space
Make sure you have at least 20 GB free on the main drive.
- 3
Run the Windows Update troubleshooter
Find it under Settings > System > Troubleshoot > Other troubleshooters.
- 4
Reset the update cache
As administrator, stop the Windows Update service (net stop wuauserv), rename C:\Windows\SoftwareDistribution, then start the service again.
- 5
Check the error code
Search the update error code shown in Update history for specific fixes.
When to call a technician
Keeping every computer updated is one of the most important security steps for a small business. We manage updates across your office so they install reliably and don't interrupt work.
On-site support across Orange County · see our IT support, managed IT, Microsoft 365 support and cybersecurity services.
Frequently asked questions
Can I turn off my computer during an update?
Avoid it if you can. If the update is truly frozen for hours with no disk activity, a restart is usually safe, and Windows will roll back.
How long should Windows updates take?
Monthly updates usually take minutes. Large feature updates can take an hour or more on older hardware.
Is it safe to skip Windows updates?
No. Security updates fix vulnerabilities attackers actively use. Delay them briefly if needed, but don't skip them.