Click Ctrl + Shift+ Escto launch Task Manager. Click Run new task in the top center. Type windowsdefender:. Check the Create this task with administrative privileges box , then click OK .
3. Use SFC and DISM
Some Windows 11 applications such as Windows Security may stop working due to corrupted or modified files. Fortunately, you can use the SFC System File Checker and DISM Deployment Image Servicing and Management tools to detect and restore these files to the correct version.
Press Win+ Rand type cmd. Press Ctrl+ Shift+ Enterto open a command prompt with administrator rights. If your account does not have administrator rights, this will not work.
Run sfc scannowthe command and wait for the SFC tool to scan your system.
Run SFC scan in Windows.
Go ahead and check if Windows Security opens. If not, it's time russia telegram data to run DISM. Note that DISM may need to download some Windows files from Microsoft servers, so keep your PC online.
Open Command Prompt again with administrator rights and run the following commands in sequence:
DISM Online Cleanup-Image CheckHealth
DISM Online Cleanup-Image ScanHealth
DISM Online Cleanup-Image RestoreHealth
Once finished, restart your computer and try to start the Windows Security service.
4. Disable background apps
I often find processes and applications running in the background even after I think they are closed. These background applications can cause problems with Windows Security starting. Stopping everything that is not necessary and performing a clean boot may be just the fix your PC needs.
Press Win+ R, enter msconfig and press OK . Select the Services tab . Check the Hide all Microsoft services box and press the Disable all button . Press OK to save the settings.