I just did a clean re-install of windows 10 and I've got the windows.old and windows.old000 folders which have about 150gb of files between them, is it possible to recover all of these files back? Doing a quick google takes me to pages that want me to download programs and I am little suss on downloading anything right now.
Just look through there for whatever you might find.
At most, some of your personal docs and files. Not applications.