
Fix Outlook Service Unavailable After Update
You open Outlook after a recent update and see “Service Unavailable” or “Cannot start Microsoft O...

You open Outlook after a recent update and see “Service Unavailable” or “Cannot start Microsoft O...

If you see a yellow warning in Windows Security that says "Real-time protection is off" or it tur...

You try to enable or update Windows Defender, but get an error about a version mismatch. This typ...

You start a systemd service and it immediately restarts, or it runs for a few seconds and then re...

If you see the error 'Windows activation token expired' when trying to activate Windows, it usual...

You try to open Outlook and see a message like "The file Outlook.pst is locked" or "Cannot open y...