I usually use firefox.
So I found a solution on youtube (couldn't get into most of the firefox forums as they too were 'untrusted')
For anyone else who gets this it happens when your PC clock goes back (why does that happen?). Mine had set itself to year 2000
Here is the link in case anyone else gets this annoying problem
http://www.youtube.com/watch?v=A61BEs7e78U
