Antivirus without updating
This allows you to roll back to the previous build of Windows 10 if you have a problem.
However, if you’ve removed old Windows installations using Disk Cleanup or manually deleted the folder after the upgrade, it won’t be there.
RELATED: Windows shouldn’t remove any important files, but it may accidentally remove settings or other files associated with a program.If a program is known to cause crashes, bugs, or otherwise conflict with Windows, Windows may remove it to keep your system stable.If this happens, the “All of your files are exactly where you left them” screen will appear like normal–this screen always appears during major updates–but Windows will actually have removed some of your program files.This is the takeaway from some people’s experiences with the “November update,” Windows 10’s first big update.
Microsoft has refused to comment on this, but it seems like the update process is designed to remove incompatible programs.
Otherwise, assuming it’s been less than 30 days, your old program files will still be there for you to recover.