On my laptop (ultrabook) you can't press the screen with your fingers. What is the reason (the pen does not work either)?

On my laptop (ultrabook) you can't press around with your fingers on the screen. What is the reason (the pen does not work either)?

Opportunities:

You don't have any fingers / hands with which to press around on the screen
It's not a touch screen
You have switched off the touchscreen in the system settings

I take the 2.

Many ultrabooks don't have a touchscreen!