What is "Windows Update" in my Windows 8 service list? And how is "Windows Update" service related to wuaueng.dll?

"Windows Update" is a Windows 8 service that Enables the detection, download, and installation of updates for Windows and other programs. If this service is disabled, users of this computer will not be able to use Windows Update or its automatic updating feature, and programs will not be able to use the Windows Update Agent (WUA) API. "Windows Update" service is provided by wuaueng.dll program file.

Detailed information on "Windows Update" service:

Service name: wuauserv
Display name: Windows Update
Execution command: C:\Windows\system32\svchost.exe -k netsvcs
Dependencies: {rpcss}

"Windows Update" service is provided by a program called: wuaueng.dll:

Name: wuaueng.dll
Location: C:\Windows\system32\wuaueng.dll
Description: Windows Update Agent
File version: 7.8.9200.16465 (win8_gdr.121126-1503)
Size: 3279872 bytes
Modified: 10/8/2013 10:27:56 PM UTC

Disabling "Windows Update" service may cause issues when running Windows 8 system.

⇒"svchost.exe -k netsvcs" Services on Windows 8

⇒⇒Windows 8 Services Tutorials