I had the same issue before, but what I had found on that machine was a bios going flaky. Ok, so here is a question, did it boot to windoze every time? The computer that I worked with that had this issue would boot to windoze several time and then all of a sudden not boot 1 or 2 times. So, I ran hdd diag test several times and found that the error could would change causing windoze not to boot. Now, as far as linux. I could not get it to boot on this machine either, until a changed some settings in the bios and then I was able to boot. I know that Dell's can be a real bear to change to the settings you need. What I figured out, is that SATA is set for 1st book devices. The trick is, getting the cd-rom as the first boot device. I know your thinking that I have the bios set as cd-rom, hdd sata, ect, but what I did find is that there is another setting in the bios that will actual set this as this. After several hours of searching, I found that if you don't change this setting the bios will look at both the sata and cd-rom, with sata being the primary. The setting in the bios is labeled as "Sata as primary" or something like that. It took me a while to find it and not all systems are the same. So, once I found that setting, I changed the Sata default and then rebooted the computer right to linux with no issues after that. The way I found this was pure luck anyway. I was working on two exact machines, one work on was not. So when I tested the linux disk, it booted to windoze anyway, even though the boot order was right. So, I thought I has a bad linux disk and tested on another machine and it booted. So, find in the bios some along the lines that sata is primary and change that setting and it should boot, but why windoze and boot from the cd even with this setting, I have never figured out, but that is how I got around that issue. Ken