Assuming you're running Windows XP, there is a set of three anti-spyware programs that should both remove CWS (CoolWebSearch) and prevent future infections.
Download, install, and run AdAware
, and Windows Defender (formerly Microsoft Antispy)
In addition to those tools, ditch Internet Explorer and Netscape, and install Mozilla Firefox
. Granted, Netscape is based on the Mozilla engine, but Firefox is a much better program.