ChewWGA is the perfect tool to help you activate your Windows 7 license for free. Easy to use with just one click.
Only applicable for windows 7 (Remember Disable AntiVirus Program)
Run Chew WGA v0.9 with Admin privileges, Click the Apply button and wait for it to finish, then reboot the computer is complete.
If Chew WGA has been installed and is in use due to Windows update, the license will be lost. Rerun the Chew WGA v0.9 file, select the Revertl button, and then restart the computer. And reinstall the program again.
