After an unexpected crash, windows 7 booted up into a mode that I'm not familiar with where it asked to restore the system to a previous save point to correct some problem. After saying OK to it I've come to find a file that was actively being worked on (.nsis extension, text file, it's a windows installer script) was reverted (2 days work lost) very much unexpectedly.
I can't find a backup of the file anywhere and so I'm wondering, in the process of reverting to a previous save point, does windows backup its work anywhere?