Temp folders and files are common issues. They are usually created by wanted and unwanted updates and upgrades. They may stay there with some encrypted names like, drawn out of the hat, 7bskrhfm1007397... or anything.
a. Run a cleaning program like CCleaner. To check and fix your registry too.Temps are usually no problem, they just hang there taking some space. Inactive.
b. Why do you want to get rid of it?
c. If it won't delete, you could try Unlocker,
http://www.emptyloop.com/unlocker/ --- although I don't think this is the problem.
d. If it restarts every time, it's probably because you have an auto update, you should be able to change it from NVidia settings, or the new update hasn't installed, which is the most probable answer. It'll start update, until it's satisfied. One solution is to check directly with NVidia, do you need an update? I don't think the temp is dangerous.
e. If you get a message like "Requires admin", you'll probably be able to do it by just clicking "Continue".
f. Messing with files and folders is dangerous, unless you know what you do.
Hope there's some help? Main thing is, computer works?