wuauclt - wuauclt.exe
wuauclt.exe (wuauclt stands for Windows Update client for WindowsME) is a Windows Millenium generic process used for updating Windows Millenium via the Internet.
The file that corresponds to this process is normally found in the directory "%%SystemRoot%\System32\wuauclt.exe" (where %systemroot% is usually C:\WINDOWS by default).
It is a process which can be terminated. However, it may be the Trojan horse Troj/Cult-B. The following entry in the registry confirms that the Trojan is present:
Microsoft auto update = WUAUCLT.EXE