Why "Windows Security Center Service could not start" message appears when I login to Windows?

1. Quick fixes
Restart the service by command
Press Win+R and type services.msc
Find the “Security Center” service
Right click → “Properties” → change the startup type to “Automatic”.
Click “Start” button
2. System file checking
Run CMD as administrator
Execute it in order:
cmd
sfc /scannow
dism /online /cleanup-image /restorehealth
3. In-depth solutions
Service dependency failure
Check that the dependent service is running:
Press Win+R and type msconfig
Switch to the “Services” tab
4. Make sure the following services are enabled:
Windows Defender antivirus service
5. Windows Firewall
Group Policy Conflicts
Press Win+R and type gpedit.msc
Navigate to:
Computer Configuration → Administrative Templates → Windows Components → Security Center
Check if the “Disable Security Center” policy is enabled.
6. Advanced Repair
Registry Repair (proceed with caution)
Press Win+R and type regedit
Locate:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc
Confirm that the Start key value is 2 (automatic startup).
7. Alternatives
Create a new user account
Go to Settings → Accounts → Family and other users
Add a new local account and test if the problem persists
8. Preventive Measures
Run Windows Update regularly
Avoid disabling security services with third-party optimization tools
Create a system restore point (rstrui)