> Removable devices would be 1, cdrom 2, and 3 is hard drive. Removable is just
generic term for any USB drive, SD card, or Mini Flash. No harm is going to come
of changing the boot sequence.

Many thanks for your replies. I wasn't sure... i'm more familiar with
older machines when it comes to tinkering and on those i recall having
a drop down menu and one selected from a list like A, C, E or E, A, C
(or similar) where A was the floppy, C hard drive and E was CDROM.

Something i should have looked into before but i'm afraid i have a
busy time looking after my mother with Alzheimer's so i don't like to
be too venturous as i depend on the PC for loads of things... and
couldn't stand the thought of messing it up somehow.

Gobby nice to hear from you... think you were the person to reply to
my first post on here when i started using ubuntu in 2007. I've now
been a xubuntu user for about 3 years and have to say i've had few
problems. I did look at some other distros over the last couple of
weeks but have to say none of them for xfce compare with xubuntu (i
love the minimal environment which i add my preferred apps to).