NotepadSo what will this break?
The real question.So what will this break?
Yup, every feature release does this. They call it an update when it is really an OS upgrade.I installed it on a machine. Note that you'll end up with 2 complete installs of WIndows. c:\windows and c:\windows.old(?) So basically it's a complete OS replacement, not an update.
Go into Drive Cleanup and you can blow away the old version of about 25GB