What is "Diagnostic Service Host" in my Windows 8 service list? And how is "Diagnostic Service Host" service related to wdi.dll?

"Diagnostic Service Host" is a Windows 8 service that is used by the Diagnostic Policy Service to host diagnostics that need to run in a Local Service context. If this service is stopped, any diagnostics that depend on it will no longer function." "Diagnostic Service Host" service is provided by wdi.dll DLL file.

Detailed information on "Diagnostic Service Host" service:

Service name: WdiServiceHost
Display name: Diagnostic Service Host
Execution command: C:\Windows\System32\svchost.exe -k LocalService
Start type: Manual
Service status: Started
Dependencies: None

"Diagnostic Service Host" service is provided by a DLL file called: wdi.dll:

Name: wdi.dll
Location: C:\Windows\System32\wdi.dll
Description: Windows Diagnostic Infrastructure
File version: 6.2.9200.16384
Size: 109,568 bytes
Modified: Wednesday, ‎July ‎25, ‎2012, ‏‎11:07:45 PM

Disabling "Diagnostic Service Host" service should not cause any issues when running Windows 8 system.

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

⇒⇒Windows 8 Services Tutorials