Hey, I'm no IT guy, but I did a quick search for your error, and it looks like a client side issue with your web browser. In other words, it's a problem with the program you're using to surf the web. [url = http://support.microsoft.com/kb/886216]THIS LINK[/url] has a suggested solution for internet explorer. If that doesn't work, you might try updating your web browser, using a different web browser, like firefox or chrome, or you could search for "[your web browser] 500 error" and see if you can find a solution that works.

Good luck getting it resolved!

Ah, sorry. Botched the link formatting. Here it is again:

http://support.microsoft.com/kb/886216