To be honest, I find "it is encrypted and says it,s something to do with my browser and cookies" a bit vague.
Try to get in again, then drag your cursor over the text in the message to highlight it. Right-click and select Copy. Then post again here, right-clicking and selecting Paste, so that we can read
exactly what the error message says.
Alternatively, try using a different browser. Very few of the 'regulars' in AB's Technology section use the dreaded Internet Explorer. Most of us prefer Firefox:
http://www.mozilla.org/en-US/firefox/all/
(Use the 'English (British)' download link, in the 'Windows' column).