When it works you can't see start menu/taskbar at Windows start.
The W32.Kwbot.C.Worm attempts to send itself through the KaZaA and iMesh file-sharing networks.
Also this worm may used by hacker to take control of the computer - trojan capability.
Can be in 3 different registry locations:
HKLM\..\Run: [,main drive Loader] wininfo.exe
HKLM\..\RunServices: [,main drive Loader] wininfo.exe
HKCU\..\Run: [,main drive Loader] wininfo.exe
You must delete all three instance of wininfo.exe.
Greatis Startup Optimizer will help you to do it quickly.