Most likly he has been hijacked by a semi-malicious cookie, if he has IE6, then just have him delete all his temporary internet files as well as his cookies, then click Use Default instead of Use Current. If he has an older version of IE, have him delete the temporary internet files and then click on the Settings button next to it and then click on View Files, have him highlight and delete everything in the folder, then click Use Default back on the main tab of the IE properties.
Good luck!
Knight3058