When did the problem arise? If it was recently, do you have a restore point you could use to see if that mitigates the problem? Sometimes, for whatever reason, a Windows update might screw something up for me, so I restore to an earlier point to get around it.

If all else fails, a repair install might help to replace whatever missing files there are. A repair install preserves all your programs and data while essentially scanning for any Windows errors and fixing them.

More reading and tutorial about repair installs here. You just need an CD or USB image of Win 7 64 SP1 (which you can get at the link) and your personal license Win 7 license/key.

This has been bugging me for 2 hours now. WHAT DOES HE NEED?!

LOL, I've never trailed off like that before. Finished the thought. :)

Could be UAC interfering.

Clearly the problem is that you tried to uninstall Torchlight.

The computer is thinks that anyone removing Torchlight must be unfit for good decision making, and therefore revoked your admin rights. I don't think there is anything you can do, as computers are quite stern about this sort of thing.

Have you tried re-downloading the game and re-installing it?

Download and install it with the windows installer not the GOG installer, then try uninstalling it and see if that works?

Edit: i had a similar problem some time ago - it turned out to be a windows service switched off, i forget which one. I do not know if i had switched it off or some program or virus did it?