Use this command to check your serials before and after spoofing:
Run CMD as administrator and type the following line:
wmic diskdrive get serialnumber
1. Reinstall your windows + the game.
2. Spoof then make an account and download RIOT
3. Stay spoofed and download the game
4. When RIOT ask for PC restart, do it.
5. After restart spoof again (make sure riot is closed)
6. Start the game and play!
Remember this is not a permanent spoofer, so you will need to spoof after every restart and when your key is expired, you can buy a new one.