BIOS in system not fully ACPI compliant 0xA5 during install


  1. Posts : 3
    Windows 8.1 64-bit
       #1

    BIOS in system not fully ACPI compliant 0xA5 during install


    Hi there,
    so I'm fixing a laptop which suddenly started getting BSODs:

    The BIOS in this system is not fully ACPI compliant.
    STOP: 0xA5 (0x1000, 0x0, 0x55AA55AA, 0xFFFF0091)
    It was running Windows 7 before but suddenly it started getting the 0xA5 BSOD no matter what was attempted. So I got the PC and tried booting from linux USB stick to test HDD and RAM - No problems. I figured since it was able to run under Linux I should be able to simply reinstall Win7 but sadly I was mistaken. When I try to install Win7 it simply shows the "Windows is loading files..." screen after which it shows the "Windows starting" screen and then BSOD. I tried with Win7 32 & 64 bit + Win8 64bit..

    I've done a ton of research by now and tried avoiding the ACPI check (spamming F7 at some point during install) but I cant get that to work. I tried wiping the HDD after reading a thread in here somewhere. I tried different hdds, pulling out some of the ram, nothing works. The most frustrating part is, I can install and run Linux (Mint) with no problems - so surely I must be able to get Windows installed somehow ? (It must run Windows)

    Any ideas or help will be greatly appreciated!
      My Computer


  2. Posts : 3
    Windows 8.1 64-bit
    Thread Starter
       #2

    Oh btw it's a Lenovo U550 but I guess that not important :)
      My Computer


  3. Posts : 3
    Windows 8.1 64-bit
    Thread Starter
       #3

    If i try to install Windows 7 in safe-mode.. The BSOD appears right after it has loaded DRIVERS/disk.sys..
    Btw I have tried both with an without AHCI enabled... doesn't matter
      My Computer


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 23:33.
Find Us