Choose the Windows product you want to activate from the list.

The tool will set up the KMS host and activate your Windows product. This may take a few minutes.

Click on the "Activate" button to begin the activation process.

After activation, verify that your Windows product is activated by checking the activation status in the Settings app.

HEU KMS Activator is a popular tool used to activate Windows and Office products. It's a KMS (Key Management Service) activator that uses a local KMS host to activate Microsoft products.

Download the HEU KMS Activator 42.0.4 tool from a trusted source.

Run the HEU KMS Activator 42.0.4 tool as administrator.