My sister's computer runs fine on the internet, except for one website. When she gets to that one--she logs in and her computer logs her out. If she is lucky and can stay on, her computer moves slower than a turtle running thru peanut butter! She has a new system installed--Windows XP--it's only about 5 weeks old. We have done all the easy things--cleaned out the Temporary Internet Files, the Temp files, Defragged, ScanDisked, increased the "Cookie" bin, etc. Still nothing changes! Any suggestions? PLEASE?