Could not start Diagnostic Policy Service

If you are trying to run a Windows Service like the Diagnostic Policy Service and encounter an error instead that says, “Windows could not start the Diagnostic Policy Service”, worry not for this post will guide you on what you can do of the Diagnostic Policy Service is not running in your Windows 10 computer.

As you know, the Diagnostic Policy Service enables problem detection, troubleshooting, and resolution for Windows components on your Windows operating system. When you encounter this kind of problem, you will also see the “Access is denied” error message. This occurs when the “MpsSvc” process does not have the permissions needed for the Registry keys. This kind of problem happens when the TrustedInstaller account is missing the permissions for a Registry key and so to fix this issue, you need to take full control and ownership of the Registry keys.

You need to create a System Restore point first before you get started. This way, you can always undo the changes you’re about to make in case anything goes wrong. Once you’re done creating a System Restore point, refer to the following instructions to fix the “Windows could not start the Diagnostic Policy Service” error.

Step 1: Tap the Win + R key combination to open the Run utility.

Step 2: Type in “Regedit” in the field and tap Enter to open the Registry Editor.

Step 3: After opening the Registry Editor, navigate to this registry path:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesDPSParameters

Step 4: After that, look for the “Parameters” registry key and select Permissions.

Step 5: Now select your account under Group or user names.

Step 6: Next, make sure that the “Full Control” and “Read” boxes are both checked, and then click on the Apply and OK buttons to save the changes.

Step 7: Afterwards, navigate to this registry key: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlWDIConfig

Step 8: From there, look for the Config key and right-click on it and select Permissions and then click on Add and type “NT Service/DPS in the box and click OK.

Step 9: Now select “DPS” and check the Full control box, click OK and exit the Registry Editor.

Step 10: Reboot your computer and check if the error is now fixed.

If you like to learn and find out more about various Windows errors, and how to repair them go to our vast archive or use search to find articles that will explain and help you in solving your issue.
However, if you prefer to do things fast and with automatization then we are proposing to use an automated solution for your issues. The application that we are recommending is Advanced System Repair Pro
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System Tweak/Optimizer
ASR will analyze your complete system and settings to adjust your PC to function at its maximum performance.

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Over time, as you install and uninstall applications, the registry can become cluttered with old entries and broken settings which can result in program crashes, and annoying messages and slow the computer down.
Visit our Advanced System Repair Pro Download page to inform yourself about all the benefits of this software and get a free trial copy of it.
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