Win32 Aimbot is a backdoor program that can seriously damage your system.  It was first discovered in 2005 and is still causing problems for computers users today.  This pest is distributed through an instant messenger service.  The typical one is AOL.  Once you click on an instant message, an .exe file is loaded instantly onto your machine.  Your confidential information is at risk with this malicious virus on your system.  It can gather keywords, passwords and other sensitive data without your knowledge.
You can protect yourself by investing a program like SpyZooka to get rid of Win32.Aimbot and other malware you may have on your system.  SpyZooka will also run regularly to keep you spyware free permanently.