I uninstall it. I run Malwarebytes and CCleaner. I don't see it for a few hours. Then I'll be browsing a page and hearing random ads, seeing little boxes with the words "ads not by this site" on them, and random words being used as hyperlinks to pop-up ads. It goes by the name of ScorpionSaver currently, though I've seen it called other things on this computer before. How is it installing itself and how can I be rid of it once and for all??
From another installation, manually scrubbing it out. Hiren's Boot CD or other OS in a multiboot system are good choices.
Failing that, backup your shit, and reformat/reinstall. Gets a clean and fast Windows install out of it, too.
You could try running combofix from bleeping computer, if it is listed as malware in that software it should remove it. It's also free.
do the malwarebytes scan in safe mode. Also, get adblock plus and noscript if you're using firefox. also, try using Spybot Search and Destroy, and using the "immunise" tool.
