How to Log Out from sold unused device to start protection on a new device?

Greetings,

Since you've uninstalled your AVG Internet Security program on the device you sold, that device will be removed from your Multi-Device subscription's device count.
In the future, if you're going to sell a device on which your AVG is installed, please make sure that the program is uninstalled, as doing so will remove the device from your subscription.
Let us know if you have further queries.

How to Log Out from a sold device to start protection on a new bought device ?
In effort to avoiding unecessary billed from still in act of AVG protection on sold device
The service was uninstalled on the sold device.

Greetings,

Since you've uninstalled your AVG Internet Security program on the device you sold, that device will be removed from your Multi-Device subscription's device count.
In the future, if you're going to sell a device on which your AVG is installed, please make sure that the program is uninstalled, as doing so will remove the device from your subscription.
Let us know if you have further queries.