Hello, I fairly recently built my own computer and it has been working great except for the occasional BSOD on shutdown. I will shutdown the computer, and it will hang on shutting down for quite some time.. 15+ minutes, and then it will go to a DRIVER_POWER_STATE_FAILURE BSOD. I use the program BlueScreenView to inspect the minidump files and more often than not the BSOD is related to the ntoskrnl.exe . Sometimes there are other files involved, but ntoskrnl.exe is always one of them. Once it was hal.dll, tcpip.sys, win32k.sys, atipmdag.sys, and ntfs.sys. Ntoskrnl.exe was always mentioned in BlueScrenView along with one of these, more recently it was only Ntoskrnl.exe . This only started happening fairly recently, and for a couple months after building the computer I never had any of these problems. Something worth mentioning. I use the program ReadyDriverPlus to automatically disable Driver Signature Enforcement for Win7 so I can use the ATI Tray Tools program to better control my graphics card. I had a slight mishap when installing this program, and I uninstalled it (via control panel) and every time I started up the computer from then on out it would automatically go to the screen during startup where you can select "Disable driver signature enforcement" and "Safe mode" and the other startup options. It would not automatically select driver signature enforcement now that it was uninstalled, but the screen would pop up and it would show ReadyDriverPlus next to Windows 7 on the startup screen mentioned. So some files must have lingered after un-install. I installed ReadyDriverPlus again, and now each time the computer starts up it will got to that screen and instead of showing one ReadyDriverPlus entry it will show two, next to the Windows 7 selection. I am not sure if this has caused some of the issues or not, if I knew a way to completely remove the lingering settings for this program I would. Although, as I said I am not sure this is an issue. I am an advanced user, and know quite a bit about computers and how they work. I am not sure if this is a hardware issue, or something else. I have run MemTest86 for ~12 hours and no issues showed up so there is that. Computer specs: i7-920 @ 4.0 ghz ATI 5970HD 3 x 2GB OCZ DDR3 RAM running @ 1600mhz (advertised running speed) Asus P6T Deluxe V2 mobo Auzentech Prelude X-fi 7.1 sound card 2x Samsung Spinpoint F3 1TB HDD's 1x Western Digital Caviar Black 1TB HDD Antec 1200 Tower Case Win 7 x64 Thanks in advance.