Explorer represents a vital chunk of your computer so if that fooks up then your in deep doo doo. Usually when explorer closes it causes your computer to restart.
If you press ctrl+alt+delete you should see the status of Explorer.exe in the window that pops up. Try it before clicking the folder to see what it says and then see what happens after you've clicked the folder.
I don't know how to fix your problem, but it might help find out whats wrong.
Good Luck!
||= Phil =||
I don't mind when my horse is left at the post. I don't mind when my horse comes up to me in the stands and asks "Which way do I go?" But when the horse I bet on is at the Tote window betting on another horse in the same race....