You need to install it as administrator or something like that. Virtual Store won't allow you to do some things you need to.
Or something like that.
EDIT
And after looking at the latest deleted posts I noticed yours in which you found the solution to yout problem, posted it, then deleted it. Why would anyone deleted solutions to legitimate problems.
Again, I'm losing more faith in humanity. Nevertheless, I've restored your helpful post eventhough it now makes mine look completely retarded.