The Diagnostic Service Host service enables problem detection, troubleshooting and resolution for Windows components. If this service is stopped, some diagnostics will no longer function. If this service is disabled, any services that explicitly depend on it will fail to start.
This services state, in normal and safe mode, cannot be modified by a registry patch.
Default Vista Home Basic: Manual
Default Vista Home Premium: Manual
Default Vista Business: Manual
Default Vista Ultimate: Manual
Safe Setting: Manual
Service Name (registry): WdiServiceHost
Display Name: Diagnostic Service Host
C:\Windows\System32\svchost.exe -k wdisvc
Account: Local Service
What service Diagnostic Service Host needs to function properly:
What other service require Diagnostic Service Host to function properly:
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Windows Service Configurations!
Includes explanations of each service and advice on which services you can safely disable.