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I have a Dell Dimension 4400.
Did a simple remove Cd drive and replace with DVD NEC-2510 drive that was in my other Dell Dimension 2400 PC.
When I rebooted it gave me froze at start up saying PC didn't shut down correctly. I click last know config and it freezes. So I removed the DVD drive and replaced with the CD drive and same thing.
then all of sudden I get the blue screen error 0x-000000A5 ACPI not fully compliant. I did all the resets to defaults, and nothing. Even tried to reload XP and get the same error.
Hit F7 during new install and still get blue screen error.
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Now I get past that error, not sure how-didn't do anything.
But now I get the page fault in nonpaged area about 20 minutes into it.
All I did was try to remove a CD drive and install a DVD NEC_2510A drive.
When I did this it gave me the ACPI error.
I returned everything back to normal and am still getting errors.
Thanks to all of you and your suggestions.
Not sure what was up.
tried to re install XP 3 times, 4th was the charm. Installed fine and even installed DVD drive fine.
Have no idea what happened but all is working now.