Uploaded August 2026 | Updated September 2026, 2 weeks ago
Is Windows Defender crashing or refusing to start after a recent Windows update? 😤 In this video, I’ll show you how to fix the “Threat service has stopped. Restart it now” error and get Windows Security / Microsoft Defender working again.
We’ll go through several practical solutions, including checking Windows Security services, repairing system components, resetting Defender-related components, and using built-in Windows troubleshooting tools.
Sources:
https://x.com/videolan/status/2087590352350064835
reddit.com/r/antivirus/comments/1vrkto7/windows_defender_not_working
learn.microsoft.com/en-us/answers/questions/5978509/is-there-any-way-to-fix-windows-defender-threat-se
neowin.net/news/microsoft-totally-breaks-windows-defender-virus-scans-in-trying-to-fix-a-0-day-flaw
tomshardware.com/software/windows/vlc-media-player-bug-reportedly-causes-33-second-delay-when-playing-mp3-files-on-windows-developers-say-microsoft-defender-is-to-blame
apolocybersecurity.com/en/blog-posts/rogueplanet-cve-2026-50656-microsoft-defender-zero-day-system-windows-10-11-unpatched#Post-Details
✅ Fix Windows Defender not working
✅ Fix “Threat service has stopped”
✅ Fix Windows Security crashing
✅ Troubleshoot Defender after a Windows Update
✅ Restore Virus & Threat Protection
✅ Get Microsoft Defender running again
📌 Commands & Steps Used in This Video:
Open PowerShell / Command Prompt as Administrator.
Reset Defender Service: Get-AppxPackage Microsoft.SecHealthUI | Reset-AppxPackage
System File Repair: sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth
If Windows Defender suddenly stopped working after an update, follow the steps in this video from start to finish.
👍 If this video helped you, like, subscribe, and turn on notifications for more Windows troubleshooting guides!
🔔 SUBSCRIBE for more:
youtube.com/user/Britec09?sub_confirmation=1
------------------------------------------------------------------------------------------
🛍 Support me with your Amazon purchases:
UK amzn.to/3diZslY
US amzn.to/2OwZWux
Please note that as an Amazon Associate I earn a commission from any qualifying purchases that you may make through these links.
------------------------------------------------------------------------------------------
❤️ Join Britec YouTube Members:
youtube.com/channel/UC_M-iWYpQbgo4rK1YfewI5w/join
------------------------------------------------------------------------------------------
📃Watch related playlists and videos
🖥️youtube.com/user/Britec09/playlists
------------------------------------------------------------------------------------------
📃Join us on DISCORD
🖥️: discord.gg/gkcw8w7yhn
------------------------------------------------------------------------------------------
👕Check out our merch:
teespring.com/en-GB/stores/britec-store
------------------------------------------------------------------------------------------
🐦Follow and interact with me on Twitter:
twitter.com/Britec09
------------------------------------------------------------------------------------------
✅Follow and interact with me on Facebook:
facebook.com/BritecComputers
-----------------------------------------------------------------------------------------
🎬 View my Website:
BritecComputers.co.uk
-----------------------------------------------------------------------------------------
⚠️ Disclaimer: This video is for educational purposes only! Everything shown here is based on my own experience and research. Please do your own research and follow at your own risk. I’m not responsible for any damage, loss, or injury that may occur.
-----------------------------------------------------------------------------------------
#WindowsDefender #WindowsSecurity #MicrosoftDefender #Windows11 #Windows10 #WindowsUpdate #DefenderFix
Is Windows Defender crashing or refusing to start after a recent Windows update? 😤 In this video, I’ll show you how to fix the “Threat service has stopped. Restart it now” error and get Windows Security / Microsoft Defender working again.
We’ll go through several practical solutions, including checking Windows Security services, repairing system components, resetting Defender-related components, and using built-in Windows troubleshooting tools.
Sources:
https://x.com/videolan/status/2087590352350064835
reddit.com/r/antivirus/comments/1vrkto7/windows_defender_not_working
learn.microsoft.com/en-us/answers/questions/5978509/is-there-any-way-to-fix-windows-defender-threat-se
neowin.net/news/microsoft-totally-breaks-windows-defender-virus-scans-in-trying-to-fix-a-0-day-flaw
tomshardware.com/software/windows/vlc-media-player-bug-reportedly-causes-33-second-delay-when-playing-mp3-files-on-windows-developers-say-microsoft-defender-is-to-blame
apolocybersecurity.com/en/blog-posts/rogueplanet-cve-2026-50656-microsoft-defender-zero-day-system-windows-10-11-unpatched#Post-Details
✅ Fix Windows Defender not working
✅ Fix “Threat service has stopped”
✅ Fix Windows Security crashing
✅ Troubleshoot Defender after a Windows Update
✅ Restore Virus & Threat Protection
✅ Get Microsoft Defender running again
📌 Commands & Steps Used in This Video:
Open PowerShell / Command Prompt as Administrator.
Reset Defender Service: Get-AppxPackage Microsoft.SecHealthUI | Reset-AppxPackage
System File Repair: sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth
If Windows Defender suddenly stopped working after an update, follow the steps in this video from start to finish.
👍 If this video helped you, like, subscribe, and turn on notifications for more Windows troubleshooting guides!
🔔 SUBSCRIBE for more:
youtube.com/user/Britec09?sub_confirmation=1
------------------------------------------------------------------------------------------
🛍 Support me with your Amazon purchases:
UK amzn.to/3diZslY
US amzn.to/2OwZWux
Please note that as an Amazon Associate I earn a commission from any qualifying purchases that you may make through these links.
------------------------------------------------------------------------------------------
❤️ Join Britec YouTube Members:
youtube.com/channel/UC_M-iWYpQbgo4rK1YfewI5w/join
------------------------------------------------------------------------------------------
📃Watch related playlists and videos
🖥️youtube.com/user/Britec09/playlists
------------------------------------------------------------------------------------------
📃Join us on DISCORD
🖥️: discord.gg/gkcw8w7yhn
------------------------------------------------------------------------------------------
👕Check out our merch:
teespring.com/en-GB/stores/britec-store
------------------------------------------------------------------------------------------
🐦Follow and interact with me on Twitter:
twitter.com/Britec09
------------------------------------------------------------------------------------------
✅Follow and interact with me on Facebook:
facebook.com/BritecComputers
-----------------------------------------------------------------------------------------
🎬 View my Website:
BritecComputers.co.uk
-----------------------------------------------------------------------------------------
⚠️ Disclaimer: This video is for educational purposes only! Everything shown here is based on my own experience and research. Please do your own research and follow at your own risk. I’m not responsible for any damage, loss, or injury that may occur.
-----------------------------------------------------------------------------------------
#WindowsDefender #WindowsSecurity #MicrosoftDefender #Windows11 #Windows10 #WindowsUpdate #DefenderFix
