Sometimes, however, when the patch, or maybe even service pack, is being installed during shutdown or startup, the update installation gets stuck - freezes, locks up, stops, hangs, clocks... Windows Update is taking forever and it's time to fix the problem.
Here, we’ll show you how to get Windows Update working again when it fails, and what to do if it looks like an update is causing problems. We put this step first because it’s surprising how much it helps when you run into an unexpected problem.
Search for a phrase like “Windows update problems” or “Windows 10 update” and see if there’s any recent news regarding the software.
You'll see either no activity at all (stuck) or very regular but very short flashes of light (not stuck).
Chances are that the updates are hung before the 3-hour mark, but this is a reasonable amount of time to wait and longer than I've ever seen a Windows update take to successfully install.
If you don't see anything at all on screen, especially if you think the updates might have been installed completely, see our How to Fix Problems Caused by Windows Updates tutorial instead.