Windows 10: activation does not work - so you solve the problem

If you have updated from Windows 7 or 8.1 to Windows 10 and the activation does not work, you are not alone with this problem. We'll show you how to solve the problem with Windows activation.

Activation of Windows 10 doesn't work - that's why

• If you have installed Windows 7 or 8.1 on your computer, you will receive the upgrade to Windows 10 free of charge. So that the upgrade is carried out successfully, nothing may change in the hardware.
• Windows already recognizes the formatting of the hard disk as a change in the hardware, so problems can quickly arise here. Try not to reinstall Windows 10, but use the upgrade in Windows Update.
• If you have installed the upgrade to Windows 10, your product key will be changed automatically. Only now can you change the hardware on your computer or completely reinstall Windows 10.
• If Windows 7 or 8.1 was not previously installed on your computer, you must first install the old versions in order to then upgrade. Windows 10 Pro can only be used with a Professional and Ultimate version of Windows 7/8. Otherwise, use Windows 10 Home.

Activate Windows 10 by phone in case of problems

Windows 10 can also be activated by phone in some cases. If this does not work either, you will then be connected to a Microsoft employee. The call is free from the German landline.

1. Press the [Windows] and [R] keys simultaneously so that the "Execute" command opens.
2. Enter "slui 4" here and confirm with "OK". Then select your current country.
3. Now call the number displayed and give the computer voice the code shown.
4. You will then receive a code with which you can activate Windows 10 on your computer.