I am very much a novice with respect to debugging computers, but hopefully someone can help me anyway. Here's my problem. I have a custom built computer that is running Windows XP, SP3. However, it is worth noting that this problem began when I was running SP2. Here are some details about my computer: Windows XP, SP3 AMD Athlon(tm) K7 chipset Motherboard: Epox EP-8K7A BIOS Name: Award Modular BIOS v6.00PG BIOS Vendor: Award Software International, Inc. SMBIOS Version 6.00 PG date 3/4/2002 Additional BIOS info: 18.104.22.168.00 Graphics card: NVIDIA GeForce FX 5500 Graphics card Driver version: 22.214.171.12419 Now here is my problem. Nearly a year ago, my computer started crashing during a cold boot (I'd get a BSOD error). Then I would try to boot the computer up again, and it would boot into Windows, without a problem. Then if I rebooted my computer from Windows, it would reboot without a problem. In other words, I only experience this problem when I boot up the computer after it had been sitting for a while shut off (a cold boot). Initially, the computer would only give me a BSOD once during a cold boot and on the second boot attempt, go right into Windows without a problem. Over time, it has increased to 6 or 7 boot attempts before it goes into Windows. The BSOD has given me various error messages. Some of them are below: 1). PAGE_FAULT_IN_NONPAGED_AREA (the most common error message) 2). STOP: c000021a 3). STOP: 0x0000007E (0xC0000005, 0xF86BBDCE, 0xF8B6DAC8, 0xF8B6D7C4) ACPI.SYS - Address F86BBDCE base at F86A7000, date stamp 480252b1 4). STOP: 0x0000008E (0xc0000005, 0x8056243B, 0xF5CBDBB8, 0x00000000) 5). MULTIPLE_IRP_COMPLETE_REQUESTS Also, many times the BSOD error message mentioned one of my NVIDIA graphics drivers as the problem. Other times it implicated the ACPI.SYS driver as the cause of the problem. Regardless though, once it gets into Windows and I logon, I have no problems and my computer runs very well for hours at a time, until I shut it down at night. I have downloaded and run as many diagnostic tools as I could find on the Internet (registry cleaners, old driver removers, temporary file removers, spyware/malware removers, etc.) and nothing has helped. I used Driver Sweeper to remove all the old NVIDIA graphics drivers and then updated to the most up to date driver using Safe Mode with Networking. I had seen that in a post mentioned to someone else as a problem. It did not resolve the problem. I also replaced the ACPI.sys driver using my XP CD in recovery mode. That did not resolve the problem either. I am at my wits end here. I really want to fix this computer, but I've tried everthing I can think of and nothing has worked. I am looking for as much input as I can get, and I am open to the possibility that I either have to reformat the entire hard drive, or buy a new computer. It would just really be a great ego booster if I could find out what is wrong and fix it. Thanks!