If a virus, such as the Netsky, destroys your rundll32.exe or, if for some other reason, your rundll32.exe is corrupt or gets accidentally removed, you need to take the following action: Backdoor.Lastdoor, and Trojan.StartPage (among others). Viruses using the name rundll32.exe are. You should scan your computer immediately with a virus scanner. If it executes or runs from a different location it is most likely a virus or trojan horse. The process runs from your system directory C:\windows\system32. Without this process your computer would become instable and very slow. The process rundll32.exe executes dll files and puts their libraries into your system's memory. Rundll32.exe is an important process of your windows operating system.
