How you are trying to install ? are you installing using root ?

If you question is about reseting root password try below url thats shows how to login single user mode. Or if u want try new opensource OS I would suggest ubuntu or mint.

If none above , let me know what your real question :)

I do agree with Deop, Ubuntu will work absolutely fine.

Bit still if you willing to reset your existing OS root password then please do follow below.

during the booting time by pressing any key on keyboard you will get an option to enter into grub menu and from their you can edit kernal version and reset password by passwd command it will help you to reset password for root which is super user.