Despite the similarities between two Fujitsu Siemens Esprimo laptops that were purchased at the same time, one of them can not be activated Windows 10 Pro (even after the ATI disk recovery process). The reason for this behavior may be the presence of cheap or inactive
windows 10 keys in the laptop. To solve the problem, you need to use the Windows 10 Pro marketing key and change it to an active key. This way, it will allow you to activate Windows 10 and continue working with this laptop. You can also learn about ways to buy cheap windows keys.