Boot into safemode and remove it.
Windows XP
If the computer is running, shut down Windows, and then turn off the power
Wait 30 seconds, and then turn the computer on.
Start tapping the F8 key. The Windows Advanced Options Menu appears. If you begin tapping the F8 key too soon, some computers display a "keyboard error" message. To resolve this, restart the computer and try again.
Ensure that the Safe mode option is selected.
Press Enter. The computer then begins to start in Safe mode.
When you are finished with all troubleshooting, close all programs and restart the computer as you normally would.
To use the System Configuration Utility method
Close all open programs.
Click Start, Run and type MSCONFIG in the box and click OK
The System Configuration Utility appears, On the BOOT.INI tab, Check the "/SAFEBOOT" option, and then click OK and Restart your computer when prompted.
The computer restarts in Safe mode.
Perform the troubleshooting steps for which you are using Safe Mode.
When you are finished with troubleshooting in Safe mode, open MSCONFIG again, on the BOOT.INI tab, uncheck "/SAFEBOOT" and click OK to restart your computer
once you get into safemode simply remove it.
A list of bad spyware programs
http://spywarewarrior.com/rogue_anti-spyware.htm
At the bottom you will see good programs.
Once removed then I suggest
Start, my computer, right click on your hard drive, select properties, select tools, error checking click "check now"(chkdsk).
Ad-Aware SE Personal
I run this daily
SpywareBlaster 3.5.1
I update once a week (keeps bad pages with known malware that cold cause damage from being displayed.)
Spybot - Search & Destroy
Daily or every other day
CwShredder
This is one I only use once a week or month lol but good to have
AVG Anti-Spyware
daily
Download and update (update is very important before you scan) boot into safe mode (You do not need to boot into safe mode every time to run programs. Some malware cannot be fully removed or detected unless you are in Safemode, This is why I recommend running it the first time in safe mode then perhaps once a month in safe mode)
With some computers if you press and hold a key as the computer is booting you will get a stuck key message. If this occurs, instead of pressing and holding the "F8 key", tap the "F8 key" continuously until you get the startup menu.
Scan the computer,
Boot backup into Normal mode, download
CodeStuff Starter manage your startup programs
Disable all startup programs that you "do not" need running at startup.
A guide to hep keep a smooth system.
Maintain your system with Windows XP
Diskeeper
The best program to use for defragging