to what Jim said
What browser is bobperry using
It isn't an OS problem it is a browser problem - the history, cache and cookies all need to be deleted now. These have been restored every time you have tried to log on to the site. Delete the board cookies again then go through you history, cache, cookies etc., in your browser and delete them all. This is one of the reasons why I like Opera - very easy to go through and fix little irritating things like that - by site which is really cool.
One thing I have learned in 20 years of fixing the Geek Squad's computer repairs is that it is usually cheaper to get someone you know who KNOWS what they are doing to fix yer puter. Of course I guess I shouldn't be to persnickety - they are the reason why I have my Cubs
The Geek's at the stores usually know less than my Mom does about puters.