
Checklist to Enable Windows Security Auto Start
If Windows Security (formerly Windows Defender) doesn't start automatically after you log in, you...
Software troubleshooting desk

If Windows Security (formerly Windows Defender) doesn't start automatically after you log in, you...

You see error 0x800704ec when opening Windows Defender or Windows Security. The message says auth...

When you see 'authentication failed' in Command Prompt, it usually means the system couldn't veri...

You try to start Windows Defender or change its settings and get an error like 'Service permissio...

If you see a warning that Windows Security virus protection is turned off, it usually means the b...

After replacing your motherboard, Windows may show activation error 0xc004c003. This means the ac...