Wow hangs on updating setup files
It looks like this feature is designed to help protect the average Windows user, who might have outdated programs installed.
Windows can clean them up and make sure they don’t cause problems.
Builds of Windows 10–like the fall update, Windows 10’s first big update–aren’t like normal Windows updates or service packs at all.
Instead, they’re more like upgrading to an entirely new version of Windows.
That’s why we can only piece this together from what people are reporting on social media and forums.
However, the Microsoft Services Agreement that applies to Windows does explicitly state that Microsoft may remove access to software or hardware.
If the program really is incompatible with modern versions of Windows–for example, if it’s an antivirus program that’s several years old–you should probably take the hint and switch to a more modern program, if you can.(We’re really not sure about this, as Microsoft won’t explain how this works.) If you need the program’s files back, you can get them.Windows 10 will keep your old Windows files for 30 days after an upgrade, storing them in the C:\folder.Otherwise, assuming it’s been less than 30 days, your old program files will still be there for you to recover.