I got this message and I wonder if anyone can tell me why.

"No user specified. If you followed a valid link, please notify the administrator."

I should mention that I've had a lot of glitches in the past trying to send a message to my friend. I installed Windows 7 and it seemed to clear up most of them. Now I get a message that says "PC is not responding. Recover web page." Has anyone any idea what is going on?