Powershell `Set-MpPreference` not recognized

Question

On running Set-MpPreference -DisableScriptScanning 1, I'm getting:

The term 'Set-MpPreference' is not recognized as the name of a cmdlet, function, script file, or
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ Set-MpPreference -DisableScriptScanning 1
~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Set-MpPreference:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

I've gone through the following threads, but nothing seems to work:

• Add-MpPreference is not recognized as a name
• Powershell Set-MpPreference -DisableRealtimeMonitoring $true not working

I'm using Powershell v5.1 on Windows 7.
What could the reason be?

Answer 1

Have you tried

Import-Module Defender

I am not sure if the module exists on Windows 7 yet tough...

Answer 2

Use 64bit Powershell:

C:\windows\sysnative\WindowsPowershell\v1.0\powershell.exe