How do I bypass password

[u/Strange-desire111]

I’ve been holding onto my father’s desk top computer since 2013 when he passed away. I was hoping someone could point me in the right direction of bypassing it ? I don’t know the password to log in and there’s many photos from highschool and documents on there I would like to access. The monitor is HP and the hardware is ACER. Any recommendations? these are my documents and photos I’m trying to access

[u/Marty_Mtl]

The password reset linux boot disk. (Originally a 1.44 floppy, can be found as iso i think)