How to get in the computer

[avila123natalia]

It won’t let me get in. The screen pops up and says it’s loading but it takes hours and it still can’t get in. I need help.

 

[Alabalcho]

What kind of computer is this (desktop, laptop, tablet)? Make? Model?
What is the operating system (Windows, Android, iOS)?
What you did last time it worked?