Question Can't change Windows 10 Pro product key

[jkl321]

Having an issue with a Windows 10 Pro activated by Microsoft Toolkit and KMSpico. I have used them both... I don't really know which is present on the system.
So lately I bought a product key. But I can't activate it, and the old key (provided by the activator) always becomes present. I've tried:

• using slmgr
  • /upk
  • /cpky
  • /rearm
• Removing the key through the activator's options
• Reinstalling the system with the disk image provided by Microsoft (even offline)
  • Changing the PID.txt and EI.cfg
• Putting another hard drive in the computer
• Updating the BIOS

I know some of these may seem unnecessary but I'm really desperate. Where is the product key stored? How can I change it? Because most of the online results didn't solve my problem.

 

[COLGeek]

Try re-installing Windows (clean install) to remove all vestiges of the formerly pirated installation.

Tom's Hardware does not support any form of software piracy. None. Period.

 

[USAFRet]

Full wipe and reinstall.
The "tools" you used are still extant in the system, and taking over.

Again...full wipe and reinstall.