Keep in mind that it's always best to use an official Windows product key for activation. Activation of Windows through Command Prompt and KMS servers is usually only intended for mass volume ...

Activate Windows using Command Prompt. Activate Windows using your phone Reactivate Windows after hardware change. Contact the retailer or OEM. Contact Microsoft Support. Let us see these in detail.

Microsoft Windows activation can be tricky when you're using individual software licenses on systems not connected to the internet. See how you can save time to get it done as quickly as possible.