Found this through google - hope it helps...
Scoured the support forums and found the fix last night!
People are calling it the "Secure Yourself" Desktop Hijack.
Here's the link to fix it:
These are the guys that my hijacked desktop linked back to.
It seems, on the surface at least, that they're an anti-spware company that got in with some majorly dodgy advertisers and were forced to post the fix on their site. Can't be good for business.
Now my active desktop's restored to normal. Yay!!!
Spread the word if others encounter the same problem.