
Windows Security App Not Opening After Update: Fixes
After a Windows update, the Security app may refuse to open—clicking the icon does nothing, or it...
Software troubleshooting desk

After a Windows update, the Security app may refuse to open—clicking the icon does nothing, or it...

If you see an error message saying Windows Security has a version mismatch, or the Security Cente...

You try to run Windows Update, but get an 'Access Denied' error. This usually means the update pr...

You click the activation link or open Settings > Update & Security > Activation, and nothing happ...

You may see error code 0x80070422 when opening Windows Security, often accompanied by a message a...

If you're looking to run Windows Security (Microsoft Defender) on Ubuntu, you've hit a fundamenta...