You are trying to install Windows 7 on your computer and everything seems to be going well. Just when it looks that the process is complete and you become ready to use this operating system that you see a message popping out and saying there is an unnamed device in the device manager. You try everything but the installation is not complete. If you have figured that it is a hardware that is named ACPI/ABT2005, it only means it is Abit’s uGuru. You need to find it and install in your computer to be able to make use of Windows 7. Get ACPI ABT2005 driver here.