Spyware and adware can prove quite difficult to remove, even for dedicated anti-spyware scanners
Even the best anti-spyware scanner missed at least a quarter of stuff it should have cleaned up.
Another reason to put your trust in alternative operating systems, or one unburdened by proprietary hooks. And drop Microsoft Internet Explorer in lieu of Mozilla or Firefox.
Comments
People who are the 'net will always get hit with something. I have spent the better (or worse, depending on the day) part of 12 years doing netowrking and the like. I still get one occasionally.
In fact, I got one when I was running FireFox. (under windows, yes)
I even got a virus under linux...