Back it goes.
I have a new Christmas Windows 10 Laptop and it goes to vertical gray lines with a 1" colored block on the screen with the gray lines. I can not get my screen back unless I do a hard power shut down. I did all the current Windows updates on laptop. I then put the full version of AVG on the laptop. It continues to go to the vertical gray lines after a short time of use. I am plugged in to 110 AC and haven't use the battery setting as yet. How do I fix this? Thanks!