Can not get my other device protected

Ronny,
You  need to activate your license number on both devices to have paid version. Open AVG Internet Security -> My AVG -> My Subscription -> log out/ remove license and then enter your license number.

My other computer says I need to buy an account but I paid for two devices

Ronny,
You  need to activate your license number on both devices to have paid version. Open AVG Internet Security -> My AVG -> My Subscription -> log out/ remove license and then enter your license number.