When I uninstalled it (for being crap, slow, and full of compatibility errors) I had to manually remove many of the registry entries it left behind.

There's just something slightly creepy and sinister about the way Google put their arm round your shoulder and say "Fed up with Microsoft? Join us and everything will be ok. Just click 'accept' and never question us. We're free, remember, and we don't do coughmuchcough evil. When you wake up, everything will be just fine."