Somehow I ended up getting some adware on my server and it's been driving me crazy for the past few days. You take a look for various tools to get rid of it and the ones that want you to pay $29.95, I'm always just a little suspicious of.
Seems like MS should really be more proactive in dealing with the scourge.
Anyways, I found Ad-Aware SE Personal (which is FREE!) from LavaSoft and does a quick and easy job. They do sell more advanced tools but if you are unsure of what you have, try it out. Definitely worth the download.
Check it out at http://www.lavasoft.de
Note: with Spyware, you always have to be aware that the tool you use isn't just creating more spyware or adware on your system. This tool is fairly good and so far, I haven't see any reports of it adding more ad/spyware.
Hey Microsoft, you just bought LookOut to enhance Outlook. Do the same for Windows. If you continue to purchase companies that are providing solutions to problems in Windows that are being created by hacks, the rest of the world will thank you.
Ad-Aware is definitely a useful tool for this problem.