OperHouse;
Depends on which version of Windoes you have . 10>> I stay away from, way too many horror stories from IT people. Windows 8.0 & 8.1 NOT even going to bother. There's two here at work and they know I barely care if they work. W7 , there are some updates that break it badly. IF you can get into the area of restore points you can even undo the updates, just pick a date when you know for sure it worked ok, then tell it to restore to that point.
You shouldn't lose any documents , I'm not lost any on ~ 25 desktops.
XP, there's a new update due to the randsomware attacks, but it seems to not bother any of the other stuff.
Hope this helps
Bruce S