Originally Posted by
directhex
the "desktop" cd loads a working desktop, with a clicky gui installer (ubiquity) on the desktop
the "alternative" cd loads into a text-mode installer (debian-installer)
if you're being dumped into a busybox shell, it usually means the kernel has failed to find the drive to boot from, in my experience. this is bad. check your bios for settings which attempt to pretend nothing's changed since 2001 for XP's benefit - "legacy" or "emulation" settings, and change them. especially where disk controllers are involved