Laptop hangs every second?

My laptop is extremely crazy, when I press a button once comes the picture and then it goes away immediately.
Then I press it again, then it comes back and goes away immediately.
I can't click or write anything without the image being there every second and leaving immediately.

Does anyone have a guess as to what could be the cause since I almost never use it?

Virus, malware.

Since you said you almost never use it: maybe you should erase your laptop's hard-reset, say everything with a reset.

If you're wondering how it works, just google for your laptop and reset.