Tab Completion for Command Line

I know Tab Completion is enabled by default for the command line interface, however for whatever reason It has been disabled on my laptop.

I have checked [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Command Processor]
However setting the Completion Character to 9 or in some cases 64 (Both in Decimal) fails to work
I also tried setting the PathCompeltionChar to both 9 and 64

Nothing has worked, Are there any other solutions or a full reset to settings for the Command line interface?

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