What is the Diagnostic System Host (WdiSystemHost) service?

An explanation of the Diagnostic Service Host (WdiSystemHost) service in Windows 7.

What does the Diagnostic System Host (WdiSystemHost) service do?

The Diagnostic System Host is used by the Diagnostic Policy Service to host diagnostics that need to run in a Local System context. If this service is stopped, any diagnostics that depend on it will no longer function.

Diagnostic System Host (WdiSystemHost) service details

  • Service name: WdiSystemHost
  • Description: The Diagnostic System Host is used by the Diagnostic Policy Service to host diagnostics that need to run in a Local System context. If this service is stopped, any diagnostics that depend on it will no longer function.
  • Path to executable: C:\windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  • Startup type: Manual

Does my computer need the Diagnostic System Host (WdiSystemHost) service?

Your computer doesn’t need the WdiSystemHost service, but if your computer has a problem you’ll have to troubleshoot and fix it yourself.

Should I disable the Diagnostic System Host (WdiSystemHost) service?

First off, I have to say that it’s best to leave service optimization up to Microsoft. With that said; I would leave the WdiSystemHost service running. You won’t gain any performance turning it off and it’ll fix a lot of annoying problems for you.

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