SpyNoMore,the best anti-spyware software that i have used,it can detect and remove all stealth keylogger on your computer.anymore it can block the websites which have keylogger perilous,it is also simple to use
http://www.converter123.com/Other-Software/Other_Tools/SpyNoMore.html

You should try using MSCONFIG in Windows XP to disable some of the unnecessary programs that automatically load on start-up. Disabling these programs will help your computer boot faster and crash less.
1. In Windows XP, go to Start > Run
2. Type MSCONFIG in the “Open:” box and then any press enter on your keyboard or click on the OK button.
3. This launches Microsoft’s System Configuration Utility. Click on the Startup tab (the tab at the far right).
4. This takes you to a page with a list of “startup items.” Startup items are programs that are involuntarily loaded every time you turn on your computer. Some startup programs are absolutely necessary, others are austerely a waste of RAM.
Remember, disable only those programs that you recognize and don’t need to have running all the time. When in doubt, leave it on.
5. Click on the OK button.
6. A message will pop up telling you that you must restart your computer before these changes will take effect. Click on “Yes” and your computer will involuntarily reboot.
7. That’s it! Your computer should now boot quicker and crash less.
And you should also update our Antivirus software and run a virus scan,
If the problem persist contact support http://www.unlimitedtechnicalsupport.com

Your computer is infected with rogue anti-spyware
Try to use some free antivirus and antispyware harvest
http://free.avg.com/
SPYBot Search & End
http://www.safer-networking.org/en/download/index.html
MalwareBytes Anti-Malware
http://www.malwarebytes.org/mbam.php
Kaspersky Free removers
http://www.kaspersky.com/removaltools
You can also try to remove it manually. Use manual removal instructions
http://expetecsoc.com/latest-spyware-threats/antivirus-system-pro-removal-guide.html
OR
http://www.bleepingcomputer.com/virus-removal/
Use manual removal guide only in SAFE MODE.

This particular malware should be removed as soon as it has been detected.

As with many rogue applications, Antivirus System Pro is designed to coerce money from unsuspecting computer users, and should therefore NOT be trusted!

Instead, I suggest you check out the link not more than – here you will find information on how to rid your system of this dubious security tool.

http://www.pcthreat.com/parasitebyid-8011en.html

Reputable security program can help I guess. You should try Spyware Doctor, Malwarebytes or SuperAntispyware for removing it successfully, because ti’s one of the “strongest” ones.

The process you have to stop is Antivirussystempro.exe

You may also remove it with this removal tool for this virus.

Download it
Extract
Run
Click on the delete button

http://www.net-studio.org/eng/scrap/scrap/108-removal-tool-for-antivirus-system-pro.html