You have spyware/adware/scumware on your computer this is a free product
from Microsoft, download and check for updates,
http://www.microsoft.com/downloads/...A2-6A57-4C57-A8BD-DBF62EDA9671&displaylang=en
There are many products to remedy your problem
Lavasoft, ad-aware for free download check for updates
http://www.download.com/Ad-Aware-SE...045910.html?part=dl-ad-aware&subj=dl&tag=top5
Spybot free download check for updates and do a scan
http://www.download.com/Spybot-Search-Destroy/3000-8022_4-10289035.html?tag=pop
My advice is to do full scans do not change any settings, they are
defaulted, unless you know what you are doing leave alone.
Personally I use Webroots "spysweeper"
http://www.webroot.com/downloads/?WRSID=94fcb4c682435ccb6aab418598b72b8e
an excellent product 30 free trial Full Version there after yearly licence
is $29.95 Well worth it, this program boots up when you boot your computer,
works in the background and prevents further crap.
My thought is you only need two items
to keep your computer free of crap and that is a good Anti Virus program and
Antispyware/adawre program.
If you have SP2 installed you have a firewall which is defaulted by
Microsoft, which is fairly good.
I hope this advice has been of help to you, After you completed these tasks
Please post your results, so as other users may benefit.