Here’s how to stop the update in progress.
SelectSystemin the left hand menu.
It may already be selected by default.

TapWindows Update, which is located near the top of the window.
TapPause for 1 weekin thePause Updatessection to pause all updates for a period of time.
Pausing a Windows 11 update will stop all active downloads and halt any installation currently happening.

In most cases, the download or install can resume from where it stopped when you paused the update.
you could pause updates at any time, even if none are currently active.
The first occurs after the update downloads.

However, major Windows updates finish installation when you reboot or shut down your PC.
you’re able to’t interrupt or stop installation after an update reaches this point.
It is only possible to pause updates in the prefs app.

Don’t do it!
Turn on the toggle next toNotify me when a restart is required to finish updating.
Why Stop Windows Updates?

Windows 11, like prior versions of Windows, will automatically download and install updates.
What Can I Do if Windows 11 Is Stuck on an Update?
In most cases, a stuck update will work itself out over time.
There are a few ways toturn off your machine when it won’t shut down.
If Windows can’t complete an update, it may keep trying to install it.
You may need to do some troubleshooting tofix problems resulting from Windows updates.