Use the following Administrator PowerShell commands in sequence and wait for them to complete:

Disable-MMAgent -MemoryCompression

Enable-MMAgent -PageCombining

These commands won't output anything, this means that they went through without errors. 

Now run Get-MMAgent to confirm that MemoryCompression has a False value, and that PageCombining show a True value.

Once this is done, perform a complete system reboot and recheck Get-MMAgent to confirm that the changes indeed took effect.