Uploaded November 2025 | Updated September 2026, 2 weeks ago

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👉 Are you getting the error message “Windows could not start the Diagnostic Policy Service on local computer. Error 5: Access is denied” when trying to run Network Diagnostics Services or connect to the internet? Don’t worry — this step-by-step video shows you how to fix, repair, and solve this problem on all versions and editions of Windows, including:

🟢 Windows 11 Home, Windows 11 Pro, Windows 11 Enterprise, Windows 11 Education
🟢 Windows 10 Home, Windows 10 Pro, Windows 10 Enterprise, Windows 10 Education
🟢 Windows 8 / 8.1 Home, Windows 8 / 8.1 Pro, Windows 8 / 8.1 Enterprise
🟢 Windows 7 Starter, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate, Windows 7 Enterprise

Whether you’re using a laptop or desktop PC, this guide works perfectly for HP, Dell, Lenovo, Acer, ASUS, Toshiba, Samsung, Microsoft Surface, MSI, Sony VAIO, and all other computer brands.

Common related errors include:
⚠️ “Diagnostic Policy Service could not start on local computer.”
⚠️ “The Diagnostic Policy Service service on Local Computer started and then stopped.”
⚠️ “Windows could not start the Diagnostic Policy Service. Access is denied.”

If you see these messages while trying to troubleshoot no internet access, network connection problems, or Windows troubleshooting not working, this tutorial covers all 100% tested and working solutions.


This fix restore Network Diagnostics, Windows Update, file sharing, and printer connection features on your system.

👉 Watch the full video to see each working method step-by-step!
👉 Works for all Windows editions and devices (laptops, PCs, tablets).


🗎 Command Text :

net localgroup Administrators /add networkservice

net localgroup Administrators /add localservice

⏱ Timestamps / Chapters
0:00 – Intro
0:10 - how to fix the “Windows could not start the Diagnostic Policy Service on local computer” error in Windows 11, 10, 8, or 7
1:24 - More Suggested Videos

📺 More Related Videos
▶️ Windows 11 Tutorials: youtube.com/playlist?list=PLFStktVg2e4lzGCbhRYBPhCB8vFncdToj
▶️ Windows 10 Tutorials: youtube.com/playlist?list=PLFStktVg2e4leA44bjCdxOg4u4sGB1ZGQ

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📢 Disclaimer
This video is for educational purposes only. Copyright Disclaimer under Section 107 of the Copyright Act 1976 allows for “fair use” for teaching, comment, research, and more.

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#DiagnosticPolicyService #WindowsErrorFix #NetworkTroubleshooting #VictorExplains