Hey all. Looking for suggestions. This one's a challenge that I doubt anyone can resolve. One harware change, I just reinstalled XP Pro. No glitches on installation. The hardware change was a New 160Gig Hdd and it is Slave to my primary HDD. (the DVD drive used to be master by itself on the secondary IDE channel, now it has my CD burner as a slave) I've run Windows Memory test for hours and memtest386+ for hours, All good RAM @ CAS 2, I've check the HDDs with the drive's utilities, all good. All other functions work perfectly. But now when trying to burn DVDs with ANY software I get BSODs and make coasters. Sometimes I can burn 1/10th of the DVD, sometimes it doesn't get through the lead-in. PAGE_FAULT_IN_NONPAGED_AREA and ... IRQL_NOT_LESS_OR_EQUAL are the errors Sometimes there's a warning that the system is about to BSOD as the servie driver service, SVCHOST.DLL, will crash just before a BSOD. The box has onboard audio, 2 NICs, a GeForce 5500 video card, and an additional PCI USB2.0 controller. These were present before the re-install of XP. And I was runnign SP2 before the reinstall and am again now. I have shut off the "Enable CD Recording on this drive" option for both drives in the Drive Properties window. I've reset the BIOS PCI configuration data so it could re-organize the IRQs associated with the PCI cards. I've moved cards around in different slots at random because PCI slots seem to couple IRQs with neighbors, I've upgraded the firmware on EVERY device/component I could find and I've clocked the RAM down as slow and clocked it up as fast as it goes. All that's left is messing with shuffeling drives around on the master/slave primary/secondary. (I have removed the new HDD already, but not put the IDE devices back in the old config) That will be next. Does anyone have a CLUE as to what might be going on? I've made WAY TOO MANY coasters out of 8x DVDs to continue on my own. CDs burn just fine still ... DVDs used to burn just fine with this drive. This is my last joust with Windows XP Pro. If I cannot resolve this, I'm moving to a REAL OS, Debian Linux. - Thanks in advance.