
Viruses or malicious programs can cause your PC to work abnormally.

How to FIX: Diagnostic Policy Service Cannot Start: Access is Denied (Windows10/8/7) Step 1. If the DPS service is stopped then you won't be able to diagnose and fix several system issues that affect Windows' operation (e.g. The Diagnostic Policy Service is required to diagnose Windows problems using the troubleshooting tools that are offered in Windows 7, 8 or 10 OS.

If this service cannot start and you receive an "Access Denied" error 5, when you try to start the service manually then read this tutorial to fix the issue. The Diagnostic Policy service (DPS) enables problem detection, troubleshooting, and resolution for Windows services and components.
