Ok, this may be difficult to troubleshoot because I have very few details about the computer in question. A friend called me because I am fairly good with basic computer problems. I'm not sure of the hardware specs, but it's a 2010 or 2011 model PC with Windows 7 installed. They did a Windows Update, and let it update just fine - they did not restart or shut down at all during the update. Once the update completed however, they can't open anything up. Everytime they try opening a program, they get an error message. Also, he mentioned that at first after the update, it wouldn't even boot up. He would get a message saying that he needs to restore to system defaults. Somehow, they got the computer to boot but it wont open any programs. How do you reset a Windows 7 computer to factory settings? I can't provide specs or details of the error messages, as this friend lives out of state. But if anyone has any ideas for possible solutions just based on the description of the issue, it would be greatly appreciated!