
How to Fix Windows Security Service Unavailable
When Windows Security shows "Service unavailable" or a red banner, your antivirus and firewall pr...
Software troubleshooting desk

When Windows Security shows "Service unavailable" or a red banner, your antivirus and firewall pr...

You're in the middle of a remote session when the connection drops with a timeout error. You've c...

If you see error 404 when trying to start Windows Defender, it usually means the service executab...

When Windows Defender reports an "invalid configuration" error, it's often due to conflicting or ...

After replacing a motherboard, you may see a "BitLocker permission denied" error when trying to a...

You double-click Command Prompt (cmd.exe) and a black window flashes on screen—then disappears. T...