Quantcast win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

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  1. #1
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    Default win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    Alright i tried to to find a fitting title but i guess i still failed.

    Anyway here is my problem (written from my phone).

    I am using win 7 prof x64 on sp1. My laptop was freezing so i did a hard-reset with the power button. When booting in automatically started the windows repair tool. After some time i figured out that:

    Bootrrc /scanos didnt find any installed OS.

    So i rebuilt the bcdfile and windows was dedected. However, when booting i got a windows boot manager error:

    C:/windows/system32/drivers/msahci.sys

    I booted the windows repair mode again, ran cmd and found out that msahci.sys didnt exist in my system32/drivers folder. So i copied it from my win7 prof x64 cd (not sp1) into my c:/windows/system32/drivers folder.

    I also fixrd my mbr with bootrec fixmbr and fixboot.

    I reboot and finally see the windows 7 logo animating...until it freezes and gives me this bsod:

    stop: 0x00000007B (0xffffff8800009a97e8, 0xfffffffc0000034

    So no booting either...i then decided to delete msahci.sys from my system32/drivers folder:

    Windows boot manager error
    File: /windows/system32/drivers/msahci.sys
    Status: 0xc000000f

    Windows failed to load because sys file is missing or corrupt.

    Ofcourse i tried the automatic startup repair. No help. Safe mode doesnt work either.

    Any ideas? I believe msahci.sys is ofcourse missing but why doesnt it work when i copy it to my windows?

    And dont ask me why its missing..i have no idea :S

    @edit: figured out that the msahci.sys on my htpc (sp1) is different (bigger filesize) than on my non-sp1 windows 7 cd. Maybe this causes the bsod since i need the sp2 msahci.sys...but how do i get it on my laptop when i cant boot? Bootable usb stick?
    Currently: Dell XPS15 9530, 15.6" QHD Touchscreen - i7-4702HQ 2.2-3.2Ghz - 16GB RAM - NVIDIA GT 750M 2GB - Samsung SSD SM841 512GB
    Accessories: Filco Majestouch Tenkeyless MX-Brown Mini Otaku, Benq XL2420T (144Hz), Lo(w)gitech G400, Puretrak Talent, Sennheiser HD600
    Security setup: CIS & Mbam Pro, OpenDNS + DNSCrypt - EMET - Applocker - UAC at max settings

  2. #2
    RCB
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    On any W7 system you can create a System Repair disk. (from Backup and Restore feature)

    You can also use Rufus to make a bootable USB drive: Rufus - Create bootable USB drives the easy way


    --------------

    Addendum: There is no W7 SP2. Use the AHCI driver for the bit version of Windows you have installed.
    Last edited by RCB; 13th August 2013 at 05:49 PM.
    Dell M6600, W7 64 Ultimate SP1-U UEFI/GPT Setup, 512GB/2 Samsung 840 Pro SSD, R G B LED IPS LCD, nVidia Quadro 4000M GPU, i7-2960XM CPU, 16GB/4 1600MHz RAM
    Dell M6600, W7 64 Ultimate SP1-U BIOS/MBR Setup, 512GB/2 Samsung PM830 (OEM) SSD, WLED FHD LCD, Optimus IGP\nVidia Quadro 4000M dGPU, i7-2920XM CPU, 16GB/4 1600MHz RAM

  3. #3
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    Quote Originally Posted by rcb.to.ca View Post
    On any W7 system you can create a System Repair disk. (from Backup and Restore feature)

    You can also use Rufus to make a bootable USB drive: Rufus - Create bootable USB drives the easy way


    --------------

    Addendum: There is no W7 SP2. Use the AHCI driver for the bit of Windows you have installed.
    And it will work on my laptop (if i create it on my htpc)? And not delete any user data on my laptop?

    Thanks
    Currently: Dell XPS15 9530, 15.6" QHD Touchscreen - i7-4702HQ 2.2-3.2Ghz - 16GB RAM - NVIDIA GT 750M 2GB - Samsung SSD SM841 512GB
    Accessories: Filco Majestouch Tenkeyless MX-Brown Mini Otaku, Benq XL2420T (144Hz), Lo(w)gitech G400, Puretrak Talent, Sennheiser HD600
    Security setup: CIS & Mbam Pro, OpenDNS + DNSCrypt - EMET - Applocker - UAC at max settings

  4. #4
    RCB
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    Ok, I don't know what HTPC is?

    Edit:

    Ok, Home theater. As long as you can execute a file. I don't know if it needs a mainstream OS or not to get loaded.
    It's very simple program with lots of ability.

    If not just borrow/rent a PC and create a W7 installer on the USB stick.
    Dell M6600, W7 64 Ultimate SP1-U UEFI/GPT Setup, 512GB/2 Samsung 840 Pro SSD, R G B LED IPS LCD, nVidia Quadro 4000M GPU, i7-2960XM CPU, 16GB/4 1600MHz RAM
    Dell M6600, W7 64 Ultimate SP1-U BIOS/MBR Setup, 512GB/2 Samsung PM830 (OEM) SSD, WLED FHD LCD, Optimus IGP\nVidia Quadro 4000M dGPU, i7-2920XM CPU, 16GB/4 1600MHz RAM

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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    Quote Originally Posted by rcb.to.ca View Post
    Ok, I don't know what HTPC is?
    Home theatre pc..basically another win7 prof x64 sp1 computer
    Currently: Dell XPS15 9530, 15.6" QHD Touchscreen - i7-4702HQ 2.2-3.2Ghz - 16GB RAM - NVIDIA GT 750M 2GB - Samsung SSD SM841 512GB
    Accessories: Filco Majestouch Tenkeyless MX-Brown Mini Otaku, Benq XL2420T (144Hz), Lo(w)gitech G400, Puretrak Talent, Sennheiser HD600
    Security setup: CIS & Mbam Pro, OpenDNS + DNSCrypt - EMET - Applocker - UAC at max settings

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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    You could make a bootable Linux distro using unetbootin (pretty easy actually). Personally, I would just recover the user files and reinstall Windows. It sounds like something got corrupted and it might not just be the file that is missing, but registry entries, etc. Better be safe than sorry and reinstall I say.
    Current: Precision M6700¦3720qm¦2x240GB SSD + 256GB mSATA¦32GB DDR3 1600MHz¦Firepro M6000
    Previous: Asus G73Jh-A2¦920xm¦160GB G3 + 7K750¦Chastity vBios¦ICD7 + 0.5mm pads¦Intel 6300
    Secondary: Elitebook 2760p¦2410m¦250GB SSD¦8 GB DDR3¦HD 3000

  7. #7
    RCB
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    Yeah figured that out - Bing'd it. It should work on the HTPC or find alternate.

    I'm looking through my system, I'll get back to you in just a minute.

    Tijo - I think Rufus does the same thing. Some seem to like it better.

    I agree with the sentiment to reinstall windows. This doesn't look good.
    Dell M6600, W7 64 Ultimate SP1-U UEFI/GPT Setup, 512GB/2 Samsung 840 Pro SSD, R G B LED IPS LCD, nVidia Quadro 4000M GPU, i7-2960XM CPU, 16GB/4 1600MHz RAM
    Dell M6600, W7 64 Ultimate SP1-U BIOS/MBR Setup, 512GB/2 Samsung PM830 (OEM) SSD, WLED FHD LCD, Optimus IGP\nVidia Quadro 4000M dGPU, i7-2920XM CPU, 16GB/4 1600MHz RAM

  8. #8
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    did u mean to create a recovery disk (repair disk) or a system image ? The "windows repair tool" only offers the option to looks for a system image.. but i think thats not what i want from a different pc ?

    @tijo: I think a recent uninstall.bat deleted the system files.. if i get them restored i might be fine.

    @€dit: I just figured out that the repair disc is the same thing i meant with "Startup repair tool" which is in a 100mb partition of my hdd. so this wasnt much of a help :P I guess i try booting with a live-cd, then copy the missing system files via network from my htpc to my c: drive.

    @edit2: the repair disc from my htpc had the new msahci.sys (atleast i think so since the repair disc was built from my htpc). But still i get a bsod after copying the msahci.sys from the htpc-repair-disk...
    Currently: Dell XPS15 9530, 15.6" QHD Touchscreen - i7-4702HQ 2.2-3.2Ghz - 16GB RAM - NVIDIA GT 750M 2GB - Samsung SSD SM841 512GB
    Accessories: Filco Majestouch Tenkeyless MX-Brown Mini Otaku, Benq XL2420T (144Hz), Lo(w)gitech G400, Puretrak Talent, Sennheiser HD600
    Security setup: CIS & Mbam Pro, OpenDNS + DNSCrypt - EMET - Applocker - UAC at max settings

  9. #9
    RCB
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    Oh just options I threw out there for you too choose from - seems you're pretty comfortable with doing this just don't have available PC.

    Advanced options may work if the System Reserved partition is there. (F8) repeatedly on bootup.
    Don't think you can create a System repair USB from Windows Backup/Restore so you'll need the alternatives handy.

    Since I used F6 method for IRST drivers I can't find any thing related to AHCI files, dunno. Something I don't really ever do.

    Ok, found the AHCI Drivers, stupid search rules.

    msahci.sys 30.3 kb (11/20/2010)

    Good luck with it. Let us know.
    Dell M6600, W7 64 Ultimate SP1-U UEFI/GPT Setup, 512GB/2 Samsung 840 Pro SSD, R G B LED IPS LCD, nVidia Quadro 4000M GPU, i7-2960XM CPU, 16GB/4 1600MHz RAM
    Dell M6600, W7 64 Ultimate SP1-U BIOS/MBR Setup, 512GB/2 Samsung PM830 (OEM) SSD, WLED FHD LCD, Optimus IGP\nVidia Quadro 4000M dGPU, i7-2920XM CPU, 16GB/4 1600MHz RAM

  10. #10
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    Default Re: win 7 boot manager error, msahci.sys was missing, now in system32 folder but now bsod

    so i tried booting with a live cd (Ultimate Boot CD Win) and also tried inserting the windows xp sp2 disk just 4 trying... both ended up with the same bsod error that I get with my windows 7 booting:

    stop: 0x00000007B (0xffffff8800009a97e8, 0xfffffffc0000034

    Maybe a hardware fault and thats why some files in my system32 are also missing?

    I just come back from my traveling to Miami (with notebook).. but i would be very disappointed by Clevo/Malibal if a backpack traveling (airport to hotel to airport) would damaged the laptop that easily.
    Last edited by zakazak; 13th August 2013 at 07:38 PM.
    Currently: Dell XPS15 9530, 15.6" QHD Touchscreen - i7-4702HQ 2.2-3.2Ghz - 16GB RAM - NVIDIA GT 750M 2GB - Samsung SSD SM841 512GB
    Accessories: Filco Majestouch Tenkeyless MX-Brown Mini Otaku, Benq XL2420T (144Hz), Lo(w)gitech G400, Puretrak Talent, Sennheiser HD600
    Security setup: CIS & Mbam Pro, OpenDNS + DNSCrypt - EMET - Applocker - UAC at max settings

 

 
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