The video at the next link tells all.
I have an XPS 400 running WinXP Media Center Ver, 2002 Svc Pk2
The comp turns on and begins with the Dell Logo then it stop and a blue screen appears. I keep trying to boot up again and again. Sometimes it boots up fine, but then minutes or even hours later the blue screen appears. Sometimes I can't even boot up at all. I get three different messages on the blue screen.
Here they are:
"An Attemp was made to execute non-executable memory"
and so on...
I have re-installed the software, but this has not worked.