System Won't Boot. ACPI.sys is corrupted  


  1. NeedToKnowMore
    Posts : 4
    Windows 7 64-bit
       New #1

    System Won't Boot. ACPI.sys is corrupted


    Hello All,

    I have a Toshiba laptop running 64-bit Windows 7 which will no longer boot due to system error.
    This laptop was running fine until I attempted to download Kaspersky Internet Security.
    Kaspersky recognized another Anti-Virus on the laptop, Avast, and required it be removed before installing Kaspersky Internet Security.
    I chose to remove Avast, and when the laptop required a reboot, it failed to load into Windows. Windows attempted to fix the problem but could not. Further investigation of the error details stated that acpi.sys was corrupted.
    I inserted a Windows 7 installation disc and attempted to fix it via the Repair option, to no avail. I also copied acpi.sys from my desktop onto a flash drive, and copied it from the flash drive onto the laptop. This too failed to fix the problem.
    I also attempted to reload Windows 7 from the installation disc, but when I chose 'Upgrade', the system returned with a message "The computer started using the Windows installation disc. Remove the installation disc and restart your computer so that Windows starts normally". I cannot perform the recommended operation because Windows fails to load normally!
    I am reluctant to use the 'Custom' install, but I may be required to do so. If I do, I will post those results.

    I am suspicious that Avast may have corrupted the acpi.sys driver upon removal.


    I had performed this same operation on my desktop without issue. Kaspersky recognized that I was running AVG and required that AVG be removed, which I did via the Kaspersky interface to the AVG. Upon removal, a restart was required, and my desktop system rebooted without issue.
    Any help is appreciated.
    Last edited by NeedToKnowMore; 26 Mar 2016 at 06:11.
      My Computer
    Quote Quote

  3. ICIT2LOL
    Posts : 21,004
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       New #2

    Hello mate now being a long time Kaspersky user myself I know how touchy it is with other AV's and I am wondering how did you uninstall the Avast?? did you use the removal tool or what? https://www.avast.com/uninstall-utility

    Another way if you can get some sort of boot going is to check the registry for any Avast entries still left in there.

    Have you tried a safe mode boot? if not try and there is this to have a read through.
    Troubleshooting Windows 7 Failure to Boot
      My Computer
    Quote Quote

  4. NeedToKnowMore
    Posts : 4
    Windows 7 64-bit
    Thread Starter
       New #3

    Hi ICIT2LOL,
    When Kaspersky identified Avast, Kaspersky's interface to remove Avast was presented. I used this interface to remove Avast. Upon the removal process, a reboot was required. Again, I used the interface presented to me to reboot the system. At this point, the system would no longer boot into Windows 7. Therefore, any interaction with the Windows Operating System was impossible, for example, no ability to boot into safe mode.
    This morning, I booted from the Installation CD and chose "Custom" install. This process got the laptop up and running in Windows 7 and created the Windows.old directory.
      My Computer
    Quote Quote

  6. ICIT2LOL
    Posts : 21,004
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       New #4

    Ok mate well if it is up and running again I would be taking a look in the registry entries for any Avast entries because it is always something I do even after running the unique removal tool that most of the AV's put out.

    Now if you don't know where to check just say and we can lead you through the steps.

    Now there are ways of using the Windows.old files see this Windows.old folder - Restore into a new installation
      My Computer
    Quote Quote

 

  Related Discussions
Hello, I have a problem with the new build, PC doesn't wake up from sleep, I tried everything you can possibly think about and I narrowed it down to my last chance: in device manager I see un unknown device, is the Microsoft ACPI-Compliant System driver that is missing. I tried downloading...
Hi there, so I'm fixing a laptop which suddenly started getting BSODs: 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...
hi guys, i have a ASRock M/B and i have a unkown device, i have installed the chipset off ASRock's website. but doesnt seem to resolve it, and cant seem to actually install it, with this in mind, my computer seems to go to sleep ok though also. can anybody sugest where to get a driver for...
Non-ACPI Compliant System
in Installation & Setup

While attempting to install Windows 7, the setup says: This computer is not compliant with the Advanced Configuration and Power Interface (ACPI) standard. Windows must be installed onto a computer that supports ACPI. Contact your computer manufacturer for a BIOS update or install Windows on an...
System lockup with acpi error
in Hardware & Devices

Every so often I get a complete system lock with this message in event viewer: ACPI: ACPI BIOS is attempting to write to an illegal PCI Operation Region (0xc), Please contact your system vendor for technical assistance. I have seen it with several windows open or nothing running at all. I am...
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 16:34.
Find Us