One of my users put her laptop into "Power Saver" mode. When trying to switch it back to balanced mode, she did an incomplete "System Restore." Now pdf's won't open, as well as any type of Microsoft document. It seems the processes are all hanging each other up. I tried starting in Safe Mode, and encountered the same problem. I also tried Last Known Good Configuration, but that didn't work either. What do you think the problem is and how should I fix it?