Changed my laptop HDD to SSD from a nearby shop but the guy installed a non genuine copy of windows 10 pro

[Amour]

I recently changed my laptop HDD to a New SSD from a pc shop nearby... The problem is that guy installed a non genuine copy of windows while I previously owned a genuine one... After putting my original HDD back I can run that genuine windows without any problem... But being HDD it's too slow ... Now the main problem is the guy installed win 10 pro which is not accepting my original windows rtm passkey... And for some reasons im getting the media creation tool error on downloading the win 10 rtm ISO

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