You are infected with spyware if:

* You see too much pop-up advertisements.
* Your browser has toolbars that you haven’t installed.
* Your homepage has changed (and you can’t change it back).
* Other settings have changed without your permission.
* Your computer is slow.

To get rid of spyware and keep your computer clean you can use an antispyware or even more.
You can download a antispyware software. There are 10 good anti-spywares.
here is the reviews:

You can download one and scan your system.
All are safe and can be trusted.

You should use an antivirus program and antispyware software, because your computer is now infected with viruses and/or spyware.
Here you have more information on computer security, as well as good and free programs that you can download into your computer:
The website list Top Ten Reviews Anti-Spyware Software Review 2008=%22Top+Ten+Reviews+Anti-Spyware+Software+Review+2008%22+&y=Search&fr=&ei=UTF-8
All are safe and can be trusted and you can download one.

Learn how to Remove virus from your computer here:

Update and use your own antivirus or download one of the antivirus tools below and along with the spyware doctor and update them and restart your computer in safe mode ( tap F-8) during startup and select safe mode, then scan with the antivirus and the spyware doctor while in safe mode, this should find it so you can remove it; Please note that you should only run one antivirus on your computer at one time,,

Avira antivirus free;

Kasperskey free antivirus scanner;

Free version of spyware doctor, best for

adware,spyware and malware and backdoor trojans,

Adaware 2007 free antispyware,

Spybot search and destroy free;

If you should have a virus that will not let you download any programs then you can use this online scanner called trendmicro housecall and you dont need to download anything and it is totally free; just scan with it and remove the virus,,

SG

Get a free virus program like McAfee off torrents and what it does is fix,clean,and delete bad stuff off the registry folder. So no losing files, Major recovery or reboots, and no deleting stuff!

Try spybot search and destroy. I swear by them.

Now I see everyone else said the same thing. Darn lag.

Try Spybot Search and Destroy.

download one of the following:

AVG AntiVirus
avast!
PC Tools AntiVirus

download as many as you want of these:
Ad-Aware
Spybot Search & Destroy
Microsoft Windows Defender
SpywareBlaster

I use these programs to clean friends computers.
It helps speed up the system and usually
works every time unless there is some very unusual virus on the system.
They are all free.

1)Get spybot search and destroy, install, update and run.
2)Get avgfree anti virus, install, update and run.
3)Get windows defender antispyware, install, update and run.