"try to boot from that cd to run the Ubuntu installer"...
This is caused by just a few things.
1. The CD was not made correctly. Tell others exactly how it was made.
2. The CD drive lens is dirty. Fix? Clean it.
3. The CD drive has aged and lost the ability to boot. Fix? Replace the drive.
Need help dual booting Ubuntu 8.04 with windows XP. System is a Dell Intel Pentium 3 with 256 MB of Ram running sp2; it was previously upgraded from Windows 2000 and cleaned out by the original owner. I have an Ubuntu distro cd but when I try to boot from that cd to run the Ubuntu installer like instructed on the Ubuntu website, it just goes right into XP. I set the BIOS to boot from the CD drive first but the same thing happens. What could be causing this problem? Is there something obvious I'm missing?