Hi all, I'm new to this forum. I had encountered this error whenever I tried to reinstall an app ever since updated automatically to 8.1. I investigated all sorts of suggestions via the web,many just like the ones here in this forum without success. I ended up biting the bullet & called Dell (my PC is out of warranty) and had to pay for their assistance. After letting them have access to my PC and working for 4 hours nothing was resolved, even after setting up another user account. Dell's suggestion is to mail me 8.1 and driver disks to do a complete new install. I'm leary but what's a guy to do after seemingly trying everything else?