
How to Fix Outlook 'Command Not Found' Error
You open Outlook and see a message like "The operation failed. The command is not available" or "...

You open Outlook and see a message like "The operation failed. The command is not available" or "...

You're installing or updating Windows Security (formerly Windows Defender) and get an error about...

You open Windows Security from Command Prompt and see nothing but a blank window. This can happen...

If you see error 0x80070002 when checking for updates, and your network connection seems unstable...

If Windows Security (formerly Windows Defender) is not scanning for viruses, you may see an error...

When activating Windows, you may see an error message like "The activation port is already alloca...