|"but while trying to restore the first few just to see if it works,"|
I don't think you can restore any pics using the trial. Just some small files. Did you have file scavenger saving them to another place other than your HD like the program suggests? If not, you will get errors.
Did file scavenger find lots of your pics?
Did it tell you how many would be recoverable? If it listed the amount that were fine, then purchasing the prog would recover those files.
I still say you should take it back to the repair guy (IF you had asked him to save your files because you could still get in to safe mode.) He should recover them for you.
I think he just jumped the gun and didn't even try a recovery of your stuff, just to save time and get your PC up and running.
When I do repairs, I stand behind everything I do...bad word of mouth travels much faster than good words.
If you are getting bad sector errors, that is also not good. Ask him about that.
Some HELP in posting on Computing.net plus free progs and instructions Cheers