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#11
Mine is 10 pro clean install, no TPM and only the 2 gpedit changes (TPM and AES 256) made.
Maybe you should consider resetting gpo to default and see (if you don't have too many other customisations). I guess this method would still work Local Group Policy - Reset to Default - Windows 7 Help Forums
Maybe now I'll get around to setting up bitlocker - I'd been sort of putting it off :)
All the best, Hali