Alright, so I have tried the Manual Method and 1click.cmd Method, both not working.
1click.cmd reports Version not supported.
Manual reports Error: 0xC004F069 On a computer running Microsoft Windows non-core edition, run 'slui.exe 0x2a 0xC004F069' to display the error text.
That, displays following: An Error has occurred, The Software Licensing Service reported that the product SKU is not found,
and your fix method above spit out the two Errors:
Product not found.
Product Key not found.
I am using Evaluation Copy of Windows 10 Enterprise...
P.S: My Activation Window in settings Is also broken now..., it says it is not activated but personalization settings still available for some odd reason.
P.S.S: I did not try restarting in any way.