
Windows Defender Cannot Connect: Troubleshooting Checklist
You open Windows Security and see a message like "Windows Defender cannot connect" or "Check your...
Software troubleshooting desk

You open Windows Security and see a message like "Windows Defender cannot connect" or "Check your...

By default, Microsoft Store apps install to the system drive (usually C:). If that drive is low o...

You click the Microsoft Store icon in the Start Menu, but nothing happens—no window, no error. Th...

When you try to install, update, or launch an app from the Microsoft Store, you might see an erro...

If you see "Authentication failed" when opening Windows Defender or trying to run a scan, it usua...

You try to activate Windows and see an error saying “invalid configuration”. Thi...