It's probably way too late, now, but for future reference, there is loads
of software out there, most of it free, that would recover those deleted
files for you. When you delete a file, even if you tell Windows to delete
it permanently, it doesn't get erased. Windows just marks it as usable
space on your hard drive.
However, in order for the software to work the best, you need to stop
writing to your hard drive as soon as you realize you've deleted files
you didn't want to delete. This includes no web surfing, as each time
you load a website, it writes dozens to 100s of files to your hard
drive. Each time a file is written to your drive, you run the risk of
writing over those accidentally deleted files.
It's also important to have the recovery software write the recovered
files to a drive other than your hard drive, for the same reason.
If you're interested, do a search for file recovery software. That should
get you started. Hope this is helpful to someone out there.