Web page displays incorrectly.

I have an end user that is running XP sp1 and IE 6 sp1. Under his login, websites appear disproportionate. The letters are larger than normal and the website does not show a background. I have tried MSN.COM and Yahoo.com with both sites looking bogus. Under my login, the websites display correctly. I checked security, privacy and advanced options in IE. Also cleared out the cookies and temp files. I have also checked the font display size (Desktop properties/Settings/Advance) and they are set to normal. (Note: Installing XP SP2 will result in a computer crash because of a driver conflict.) Microsoft web support has a list of problems with pages not coming up correctly but I did not see a solution there.