I am using HP Pavilion 5380 which is working fine for some years. It is running on Windows XP with all the latest updates installed. We have the computer password protected to keep the kids off from it. In the last month when it was powered on it seemed to revert to factory settings for no reason. After logging in desktop went from custom photo and we put on to stock blue HP desktop. The desktop icons are gone and replaced by icons from C:\Documents and Settings\All Users. Some documents on the desktop such as .doc, .xls, etc; are gone. All applications are there but itunes music is gone? What should I do now?