We have all done it, from time to time; accidentally deleted a file we thought we didn’t need, or a file that ended up as collateral damage in a file deleting frenzy. The good news when you delete a file is that it is not actually lost forever, it’s just marked as “over-write-able”. And even if Windows should happen to overwrite your file it may be recovered.
There are literally hundreds of programs out there, promising to UNdelete or recover your lost files, some of which actually work. Usually its the ones you have to buy that gets it right. There is however a free option if you are using Windows 7 (and Vista).