Forum Discussion
Windows Security won't open on Windows 11
You can try the following steps to resolve the issue:
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Run the Windows Security Troubleshooter: Go to Settings > Update & Security > Troubleshoot. Find and run the Windows Security troubleshooter.
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Repair Windows Security using DISM: Open Command Prompt as administrator and run the following commands: DISM.exe /Online /Cleanup-image /Restorehealth DISM.exe /Online /Cleanup-image /StartComponentCleanup
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Re-register Windows Security apps: Open a Command Prompt as administrator and run the following commands:
powershell -ExecutionPolicy Unrestricted Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"} -
Reset Windows Security app: Go to Settings > Apps > Apps & features. Find Windows Security, and click Advanced options. Click Reset.
If none of these steps work, you may need to perform a clean install of Windows 11 to resolve the issue.
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Mark_Albin
Sorry Mark, none of your suggestions work !
So, my PC was almost fine, just one update (kb5031358) that wouldn't install by Windows update or downloading it from MS and installing manually, both fail.
MS advice, upgrade in place,..
What terrible advice, it's completely screwed my machine, deleted the HKLM /run list, so my keyboard and mouse don't work, won't let me reinstall them (double click the install exe, nothing happens).
Even tho my profile is Admin, I had to login as Admin to reinstall them).
It reset many of my tweaks that made Win 11 almost useable.
I create a txt file, double click on it and windows says it can't find it !
The Windows Security troubleshooter is no longer there.
I've tried Repairing, and Resetting Windows Security which did nothing.
I'm getting Permission pop-ups, I'm the Admin, I don't need permission to access my own files on my own machine or run programs I own and installed.
It changed ownership of my ALL my partitons and files to 'unknown' or 'NT Authority'.
I built this ne PC just over 3 weeks ago, I've done 10 reformat/fresh installs, and have yet to get to a point where I can actually install my main apps and do some work, but ultimately Win 11 Pro just self distructs.
Obviously I turned off,..
UAC (to stop Windows Nannying),
Memory Interity (otherwise many programs won't install),
Storage Sense (otherwise it will silently delete installed executables (like Skype.exe, Firefox.exe, setpoint.exe, startmenu.exe, and some exe's that stop Avira from working),
and I am Admin !
My anti-malware all works and can't find any malware, this is all stoopid Win 11 Pro (Pro, what a joke).
How could they release this ?
How can they not know how buggy it is ?
I've been building pro PC's for 25 years, this is the worst OS install I've ever done, thank goodness it was for myself and not a client - no wonder people are moving to Mac, MS is actively pushing it's customers away. MS should make a public apology, drop Win 11 and extend support for Win 10 Pro which works flawlessly.
I should just add,.. it also helps if your NVMe isn't faulty and producing "micro errors".
I returned my NVMe for replacement and so far so good, but it is day 1 today so we'll see.