Step 2:

Click on the step1deactivate.reg file, answer yes to entering it in the registry. This deactivates Windows.

Step 3:

Click on the step2msoobe.exe file shortcut, select the option as shown (telephone customer service) and select the next button at the bottom.

Step 4:

You should now see this,

select the option to change the product key, at the bottom.

Step 5:

You should now see this,

now select a key from the list of keys provided at the bottom of this page and enter it in the spaces provided. Then click on the update button at the bottom. The activate Windows by phone window will reappear at this point, just close it by clicking the X in the upper right hand corner.

Step 6:

Click on the step3activate.reg file. This reactivates Windows. You are now done. If you like you can click on the step2msoobe.exe file shortcut again to confirm that Windows is again activated.