Stop using Internet Explorer.
Download Firefox:
http://www.mozilla.org/products/firefox/I kept getting really bad spyware problems. Constant popups, Google toolbar was no use.
After about 6 cycles of cleaning them out, surfiing for a day, getting them back, I started using Firefox.
The spyware is still on my PC, but it only runs when I run Internet Explorer, which I haven't done for months.