BSOD D1 Stop Error Problem Solved! I've been doing some searching on my BSOD issue and I came across these boards. From what I can see you folks seem knowledgable and helpful so I thought I'd post and see if I can get some suggestions. First, I know how to use a computer and I am comfortable downloading and installing but I am definitely not a computer guy so you might have to dumb in down a little. I have a Dell Dimension 8400 desktop with WinXP Home edition. I believe it's a 3.0 GHz Intel Pentium 4 with 1 gig of RAM (just ordered 2 more gigs from Dell but haven't installed them yet). I think I have a 160gig HD that's nowhere near full. I believe the graphics card is an ATI Radeon X300 series and I don't know about the sound card (although my sound quit a few weeks prior to all this). I also have Norton Internet Security installed. The issue is I moved and after I set up my computer a few days ago I started getting a BSOD error that says it must shut down to protect it and it mentions disabling bios caching and gives a stop error of 0x00000000D1 (from what Ic an read possible bad memory or driver). This mostly happens upon bootup but sometimes I can get the machine to work for a few hours before it does it again while I'm using the machine. I didn't install or change anything. I literally just moved the machine. I spoke with Dell and a system restore didn't work. The guy also disabled a bunch of stuff in my set up menu (F2 during reboot to get there) and that didn't work. I downloaded updated drivers for my Dell A960 all in one printer and graphics card but that didn't help. I will try messing with the memory sticks but I'm not sure what I should do there. I have 2 500 MB sticks in slots 1 and 2 so I'll try putting the 1gig sticks in slots 3 and 4. If that doesn't work I'll try swapping the 500s out and just using the 1 gigs. From what I'm reading reinstalling XP won't help so I want to avoid that. I'm not sure what drivers I should update or how to know which drivers I need. The ones I installed were from Dell's web site because it told me what updates I could do based on how it was set up when they shipped it to me. However, most of the time their download page says unavailable. Do you need any more info from me on this? I checked out the stop error sticky at the top which talks about this issue. Here's what it lead my to: "This behavior occurs if more then one Mylex RAID controller that is supported by the Dac2w2k.sys driver is installed on the computer. This error could appear either during or after the operating system installation." I went to mylex.com and clicked "Support & Downloads" and then "Download drivers, firmware, BIOS" but I'm not sure what to select next.