This error is a Windows 10 activation bug. It occurs when the PC's owner upgrades the system from older Windows versions (Windows 7, 8, 8.1) to Windows 10.  We highly recommend doing a clean install instead. Please check the link below according to your Windows version

• How to perform Windows 10 Clean Installation
• How to perform Clean Installation on Windows 7 and 8.1 Pro

If you're hesitant to perform the clean installation, you may want to try the solutions provided here.