willy - the tracking cookies your scan is finding shouldn't be the cause of your troubles: they're just small information files that websites you visit put on your computer. The tracking cookies saved on your machine can be read by the same/other websites and used to target adverts to you. In themselves they can't harm your machine and you can set your browser up to ignore them (ie not save them) or ask if you want to save them or not.

For the symptoms you're getting I'd use malwarebytes rather than Spybot and if that doesn't work I'd try combofix (although that involves a bit more work to use, though the instructions are pretty clear).

Mick