2) I use my computer every day.

Yes/No question:

Do you use your computer every day?

Yes, I do.

Question about the subject of the verb:

Who uses their computer every da?

I do.

Question about the action:

What do you do every day?

Use my computer.

Other questions:

How often do you use your computer?

Every day.

Whose computer do you use every day?

My computer.