Extreme negativ effect

After I activated AVG Ultimate, i.e. Tune UP & Security the computer is extremely (!!) slow when surfing with Chrome. And, which is even worse, when I leave the computer without turning it off it very often happens that when I want to use it the next day it is just black. I can make it wake up only by pressing the on/off button for at least 20 sec. And I have lost my login to Google. Must each time confirm that I am I, by answering an e-mail from Google.
All this never happend before I started using AVG ! 
I am so disappointed.

Hello Lars, 

We regret the inconvenience caused.
We would like to provide you additional support to resolve this issue. 
We've sent you an email regarding it. Please check and revert back to us.

Hello Lars, 

We regret the inconvenience caused.
We would like to provide you additional support to resolve this issue. 
We've sent you an email regarding it. Please check and revert back to us.