I'm actually not all that sure where it could have come from. I run a pretty tight ship and this is the first time I've ever had a virus turn up in nearly 4 years on this particular machine (and install of Windoze if that means anything!).
Looks like everything is cleaned up on my end now. Just in case, I've un-installed stars as well as the associated directories. I'll do a re-install of stars from scratch later on.
Thanks for the ideas everyone. Any others are welcome. It just struck me as strange. That's all.
I e-mailed pokerstars as this happened to me yesterday. They replied back that it is a false positive, which was "confirmed through the use of alternate scanners from McAfee and Symantec."