Aparently I've got one of these in internet explorer.

What is it and how can i get rid of it?

Cheers

Chris

I'd adivse going and downloading Firefox. It's a different browser than IE and IMHO much better.

http://www.mozilla.com/firefox/

That said, your buffer overflow could be caused by other windows problems not necessarily IE. But I'd try Firefox, it can even import all your favourites/bookmarks automagically!