Anybody know how to get into a computer with a password, when you do not know the password?

A family member had the same problem. If you can’t guess the password within 5 or so tries then you need to purchase a new hard drive just to use the computer. (You can choose to keep your old hard drive just in case you find your password written down in a scribbler.)
It costs ~$250+ to replace the hard drive.

I really think that there is a demand for a digital locksmith training/licensing.

Yes, we need her hard drive because we need everything on it, can I take it out and put it into a new system?

I don’t think you can without PASSWORD !

Have you thought about where she might have kept a list?

Did your mother create the password?

If so, perhaps she used a family member’s name or birthday.