There are several reasons why the installation or finalization of one or more Windows updates can hang.
Most often, these types of problems are due to a software conflict or a preexisting issue that simply wasn't brought to light until the Windows updates started installing.
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.
The installation of one or more Windows updates is probably stuck or frozen if you see one of the following messages persist for a long time: is all you'll see on the screen.
Windows 7 users—and by the most accurate count available today, there are almost 750 million of them—know that clean installing this OS can be terribly time-consuming.
And though time just keeping plodding forward, Windows Update refused to do a thing.
You may have noticed that update checks on Windows 7 machines may take a long, long, long time to complete before any updates are displayed for download and installation.
Older-generation CPUs (including Intel's sixth-generation Skylake) will support Windows 7 and Windows 8.1 until Jan.
Sometimes, some Windows Update fail to install, and just refuse to get installed on your computer even when you try a couple of times. Fix corrupted Windows Update system files using DISM Tool or Check SUR. It can help fix problems that might prevent Windows Updates and Service Packs from installing. Right-click Computer Stop the “Cryptographic Service” and rename the Catroot2 folder situated in C:\Windows\System32\Catroot to something else like say Catroot2X. Now open the newly re-created Windows Update log file and have a look at its contents. If you are using Windows Update, try using Microsoft Updates or vice versa. Ater deleting the contents of Software Distribution folder, try it.