Thanks
shertmann
Spyware/adware/virus?
This sounds like a real possibility to me. Have you checked for these things?
You might also want to clear both your cache and cookies, then try logging in from adwords.google.com (rather than a bookmarked page, for example.)
And if your computer at work is one of those that is never turned off, well, it may be time to re-boot!
Have you tried another machine at work, btw?
Hope you get this sorted soon!
AWA