And after removing Kazaar I would suggest doing a virus scan with up
to date virus software, then scan for and removing any installed
spyware.
If you are in need of virus software, here are a couple to choose
from, for free.
Download the software, and in Update Manager run Update then do a
complete virus scan.
Free Offer: eTrust EZ Armor Security Suite from Computer Associates
http://www.my-etrust.com/microsoft/index.cfm
Grisoft Freeweb: AVG Free Edition:
http://free.grisoft.com/freeweb.php/doc/1/
Search and destroy any installed SpyWare/malware/adware:
Ad-aware is a free multi spyware removal utility that scans
your memory, registry and hard drives for known spyware
components and lets you remove them safely. After installing
Ad-Aware make sure to run the update feature before scanning.
http://www.lavasoftusa.com/ For large amounts of installed
spyware and such, it may be necessary to run Ad-Aware several
times to clear them all.
Here are a couple more removal tools that should also be run.
CWShredder:
http://aumha.org/freeware/freeware.php#cwshred
Spybot:
http://www.safer-networking.org/
SpywareBlaster:
http://www.wilderssecurity.net/spywareblaster.html
SpywareBlaster doesn't scan and clean for spyware - it prevents it
from ever being installed. SpywareBlaster is a non memory resident
utility. It works by setting a "kill bit" for the CLSIDs of spyware
ActiveX controls, it prevents the installation of any of them from a
webpage.
For more information:
The Parasite Fight:
http://aumha.org/a/parasite.htm
Cleaning a Pest-Infested Computer:
http://rgharper.mvps.org/cleanit.htm