Just reviewing this, you don't mention having any anti-virus software except Spyware
Blaster and Spybot S&D. These are good, but only Spybot S&D has any scanning capability
and it certainly doesn't detect everything. I would recommend Avast!
Anti-virus be installed (when you get a chance) and run a full scan with that.
Hope this helps. Cheers. Spexx.