NotATether, did you read all the posts before you wrote your post? I have already given the same advice to OP, but he is obviously not interested in trying to save the thing that way - and if more than 30 days have passed then the windows.old folder has already been deleted.
You need to find it fast because Windows is going to delete the whole folder automatically after about a month, and I'm assuming you reinstalled Windows today.
1) I used laptop 3-4 weeks after reinstallation so recover data is probably poor chance, plus I use SSD, not HDD, so I probably overwritten the data already.
I actually missed the part where he said that. Embarrassing indeed. Aside from the windows.old folder there isn't another practical way I can think of to retrieve his old files.