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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.

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Option 2 – Try fixing the Date and Time

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Option 2 – Run the System File Checker

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  • Restart your computer and then check if it has fixed the error or not.

Option 3 – Run the Blue Screen Troubleshooter

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  • Then go to Update & Security > Troubleshoot.
  • From there, look for the option called “Blue Screen” on your right-hand side and then click the “Run the troubleshooter” button to run the Blue Screen Troubleshooter and then follow the next on-screen options. Note that you might have to boot your PC into Safe Mode.

Option 4 – Check your hardware for any physical issues

There are times when faulty hardware can result in serious problems in the system such as the SYSTEM_SERVICE_EXCEPTION Blue Screen error. Thus, it is highly recommended that you check the internal components of your CPU to find out if there are any problems. And if there is any physical damage, you need to bring that to a technician to get it fixed or have it replaced.

Option 5 – Run the CHKDSK utility

You can also run the Chkdsk utility to resolve the BSOD error. The Chkdsk utility is the one that repairs hard drive errors that might be causing the problem.
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Option 1: Check the App permission to use the voice activation feature.

You have to make sure that the toggle button for the Voice activation feature is turned on globally. It can be found under the “Allow apps to use voice activation” section. You also have to ensure that the microphone is available for apps that use this feature.

Option 2: Voice activation is not working under the lock screen.

If you tend to use the voice assistant even when your computer is locked, Microsoft has a specific setting that you have to turn on. You need to make sure that the toggle button for the “Allow apps to use voice activation when this device is locked” option is turned on. However, keep in mind that the voice assistants are not locked to only recognize your voice as they also answer to anyone who will use the voice keyword.

Option 3: Check the individual permissions of apps.

If the voice assistant is not working, you have to check each one of the apps’ permissions for voice keyword, and the option to work under locked condition works.

Option 4: Run the Microphone troubleshooter.

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Fixing errors, manually vs automatic

Encountering errors is never a pleasant experience and fixing errors can sometimes take a large amount of time. Also depending on your expertise and knowledge about computers and the operating systems themselves could be determining factor would you try to wrestle with error.

error fixing on computer

We will explore and analyze the advantages of both methods so you can choose and know when to apply one and when to reach for the other.

Advantages of manual method

Full control is the main advantage of manually solving errors, when you go deep dive into manually fixing problematic issues you are one that has control. Complete freedom is also another, sometimes fixing things can be done in several different ways and when you are the man behind the wheel, you are the one that can choose how to approach and what solution to apply in order to solve the issue.

Disadvantages of using manual method

The main disadvantage that some users might encounter is that they will need to know ins and outs of computer and operating systems' workings. Of course, the more complicated errors, the more knowledge it will require in order to apply the proper fix. There is also a risk to break something else if the person that is doing the fixing is not fully competent so this is also something to think about.

Another thing that goes against manual fixing is the time it will require in order to actually fix it, some more complex stuff will probably depend on searching for some external resources like searching for compatible drivers for example, or navigating complex registry keys inside Windows.

Advantages of automatic solutions

If you are a user that has no knowledge about how the operating system works, if you do not know what is a registry or how to properly navigate through the Windows folder then the automated solution is for you. The main advantage of automated systems is that you can easily fix errors without any kind of technical knowledge and usually with just one click of a button.

Saving time is also one of the advantages of fully automated solutions because they will work much faster than manually locating the problem and then fixing it. Also, most of these systems will have in place active monitoring that will check always if your system is in top form and alert you when something is not right.

Disadvantages of one-click solutions

Automated solutions are great, they can solve various issues and errors without any knowledge from the user, but they are not perfect. Like security suites sometimes an automated system can misinterpret something as an error when in fact it is not and fixing it could mean some apps not working anymore, luckily you can choose would you like to apply the suggested solution. So if you are using one do not just click fix without looking at what it is trying to fix and maintain.

Another problem with this is the price it is carrying, manually solving your computer error will cost you your time and knowledge but good automated software will come with a price tag. Some people might not be too happy to pay for this kind of application but at the end of the day, it will still be cheaper than a professional technician. The last thing that you should be aware of is that in order for the app to do its work properly it will need to be active all the time, now for modern computers, this is not the issue but for some older ones with a small amount of memory might lead to some slowing them down. This is a price to be paid in order to have your system always errors free.

Should you use an automated solution at all?

This depends on your knowledge and time available, professional IT technicians will not need this type of solution nor will power users but for most common people this will offer computers free of errors for an affordable price.

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