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 exchange 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 excellent anti-spywares.
here is the reviews: <–http://toptenantispywareviews.com/

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

I had the same problem. i tried a bunch of free adware programs but eventually had to buy one.
I went with the NoAdware program. I tried their free trial and then finished up getting it. It’s only $40 and worked above and further than my expectations. you can check it out here.

http://sturly.com/noadware_freetrial

excellent luck!

Try To Use How to restore Windows XP to a previous state? Press here http://support.microsoft.com/kb/306084

http://www.spywareterminator.com/
http://www.download.com/SUPERAntiSpyware-Free-Journal/3000-8022_4-10523889.html
http://en.kioskea.net/telecharger/telecharger-105-malwarebytes-anti-malware

two things i use both have boot scans and therefor may be your best bet. one is spybot, the other is avast. try running spybot in safemode even if, because ive had that problem myself. usually runnign in safe mode will fix it, if not under the settings you can enable a boot scan.