I bought some Windows desktops at an auction, and now I'm trying to install Ubuntu and remove Windows. I've been able to do it on some of them but on others, when I try to change the boot sequence in BIOS, I'm asked for an admin password.
There's no way I can get it from the previous owner. Any ideas how I can overcome this?
I've tried removing the CMOS battery and replacing it after 30 minutes. That didn't work.