Windows 10 won't boot after avg install

Hello, Tim

We apologize for the inconvenience caused.
We will help you in this.
Tell us the exact steps your performed with the AVG.
And do you get any error message from the AVG when you try to boot the PC?

Installed AVG ultimate on my sons windows 10 pc and now it won't boot and cannot repair. Is there a tool or method of uninstalling and fixing the bootrec? This is a major pain I shouldn't be having to deal with.

Hello, Tim

We apologize for the inconvenience caused.
We will help you in this.
Tell us the exact steps your performed with the AVG.
And do you get any error message from the AVG when you try to boot the PC?