I received my boxed copy of Windows 8 Pro from UPS here a few hours ago, and I tried to perform a full reformat/upgrade (choosing the option not to save any files) and every time it boots into the weird blue setup screen, I automatically get the same error every time. The error is an IRQ_IS_NOT_LESS_OR_EQUAL problem, and the file stated is amdsbs.sys. You can find all sorts of problems with people having failures just like myself when they attempt to install Windows 8 on their rigs - and they're all AMD-based systems with AHCI/RAID enabled. I'm assuming I could change everything back over to IDE mode, but I'm not ready to go that far just to install this stupid operating system. There are a few 'guides' around the internet that are supposed to help overcome the problem, and it involves using DISM to mount the install.wim and boot.wim images to a local directory and replacing 3 of these amdsbs.sys files with a version from either the Developer preview or the Customer preview ISO. I have also attempted this, and I was successfully able to perform the repair (but only on install.wim since I knew what its name was - it's just 'Windows 8'). After modding only the install.wim file I was finally able to make it into the setup and get to the point where I could choose which hard drive to install the OS on. As soon as I type in my product key and choose the drive, the setup program crashes YET again with the exact same error. I'm pretty appauled that Microsoft was stupid enough to not check out a driver to make sure it works with AMD systems that use AHCI/RAID because if you have any combination of AMD chipsets and you use AHCI or RAID then you're going to get a blue screen. I have another computer with a completely different motherboard but still using AHCI, and the exact same error pops up. Does anybody have any insight as to how I can get around this crap problem and install the OS on this machine? I had to recover my last saved image through Acronis TrueImage to get my PC back to it's old Windows 7 state. Until Microsoft is able to fix this problem, I have a worthless piece of software sitting in front of me. I'm still interested in overwriting all of the amdsbs.sys files in the install.wim and boot.wim files and would be happy to try it again, but I would need more clarification from these instructions I found earlier: If anybody has anything they can add to help me with this problem I'd truly appreciate it. Thanks!