If you're on a broadband connection, and not connected to a router (and even if you are), you should be running a software firewall.
ZoneAlarm has a free version that can protect you from attacks. This will save you a ton of headaches when the next worms come around...
Be sure to download and install CWShredder. This will remove the spyware causing this issue, and repair your browser.
Oh yeah, and NEVER say yes to installing something that pops up on a web page. Even if it tells you that they found a virus, you need to optimize your system, or that they'll keep your clock accurate forever. :)
If you have an old version of Antivirus software or are brave(dumb?) enought to not run one at all, this is for you. AVG Antivirus Free Edition is a complete Antivirus solution, and it's totally free. It also will automatically update itself, without expiring like all the pay ones do. Install and run it today!
Here are a few of the best Spyware protection apps:
1) Ad-aware
2) Spybot Search & Destroy
3) SpywareGuard and SpywareBlaster
