Google chorme stops working after AVG Ultimate is installed

Hello Roger,
We regret for the inconvenience caused. Could you please let us know whether you have received any error message or blocking popup from the AVG program or from the google chrome? If so please provide us with the screenshot so that we could analyze the issue and fix it for you.
Thank you.

after I installed the AVG ultimate, the google chrome stops working, I can't open the google chrome, I have to uninstalled the AVG to make google chrome work again.I have no ideal waht causes this.
my operating system is windows Vista 

Hello Roger,
We regret for the inconvenience caused. Could you please let us know whether you have received any error message or blocking popup from the AVG program or from the google chrome? If so please provide us with the screenshot so that we could analyze the issue and fix it for you.
Thank you.