Laptop monitor shrinking

[ala3of7]

I have a Toshiba Satellite, M115 model laptop. The screen minimizes itself intermittently and will also close itself and open another tab on its own. I have basic computer skills and have looked for some solutions but I need help. This is nothing dire, just annoying. 

[Computer Hope Admin]

When you say it minimizes it self, is this the window that is open that is being minimized or is everything visible actually disappearing?

[Aegis]

The screen minimizes itself intermittently and will also close itself and open another tab on its own

Do you refer to browser windows?

[ala3of7]

It happens when I am on the internet. But it sometimes happens when I am in Picasa 3. It hasn't happend in Word. So, I guess its just when I am on the internet.