I am in big trouble with my new PC. The PC came with Windows 10 Home 64-bit preinstalled, but I want to install Windows 7 on it. The problem is that I am unable to install Windows 7 as I always get that blue screen with this message: Stop 0x000000A5 the BIOS in the system is not fully ACPI compliant. Please contact your system vendor for updated bios.

So, I downloaded and installed BIOS Update for Windows 7 (32-bit & 64-bit), Windows 8.1 (32-bit & 64-bit), Windows 10 (32-bit & 64-bit), and tried updating the BIOS. But still, during the Windows installation after copying pre-Windows files I’m getting that blue screen and the same error message again. Please help, because I bought the PC for work and due to this trivial problem I’m unable to work on the computer!

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