Don't do anything on your pc, or at least on the drive your pics are on. If they're on the system (c:) drive then use somebody else's pc to post here etc. It's best if you leave your pc booted up permanently (util the pics are recovered). Disconnect the intenet connection.
Assuming that the pics are on the c drive and that Recuva is installed on the c drive then run Recuva in normal scan. Switch to Advanced mode if you're using the wizard. Clear anything out of the Filename or Path box. Right click somewhere on the display panel and select View Mode/List View. Now search for your pics by name (you can sort the file list by clicking on the Filename header).
If you recover anything then recover to a flash drive, never to the same drive as the pics are on.
For those pics that are stalling, have a look at Info in the right hand side. Is the size correct, do they have sufficient allocated clusters? Are any of these clusters overwritten?
If no luck you might have to do a deep scan (Options/Actions). This will take some time and return thousands of hits. Again search by name to find - or not - the pics. If not found then you can select Pictures in the Filename/Path box, as deep scan will append the correct extension to files it finds. Right click and select Thumbnails View. Page through what you have in the hope of finding a copy of your pics. If found recover to the flash drive.
This is for pics. It's the same, or similar, for videos but due to the size of videos it is more likely that part of the file will have been overwritten.
Nip down to Poundland and buy a pack of CDR or DVD-R's. Backup what you have saved, or what you value. Then do it again in case the CD/DVD fails.