That is very weird and unusual ?
What browser were you using?
don't know for sure, but just maybe (LONG-SHOT-HERE), your browser was hijacked ???
I am currently in HJT bootcamp Training !!
so I can't tell you what to do but this should probably be over here;
http://forums.techguy.org/54-malware...jackthis-logs/
and make sure and read the sticky posts first and that will give you a lot of help to get started hope this helps and I am sure one of the masters will get you fixed up