What is Wualess.b and removal instructions

Wualess.b is a backdoor that provides the attacker with unauthorized remote access to the compromised computer. The intruder can download, upload and execute arbitrary files, terminate running processes, access user documents, collect system information and update the parasite. Wualess.b injects malicious code into legitimate system processes. It secretly runs as a service on every Windows startup.

Wualess.b manual removal:
Delete registry values:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv
Delete files:
wuauclt.dll, nl[X].bat
Misc:
[X] is a combination of random characters.

Exact file location:
nl[X].bat - C:\WINDOWS\Temp or C:\WINNT\Temp
wuauclt.dll - C:\WINDOWS\System32 or C:\WINNT\System32