Windows failed to load because a critical system driver is missing, or corrupt.


New Member
Hi everybody,

This is my first post on this forum. I've recently come across a problem with my computer. I'm running Windows Vista 32 bit. I shut the computer down one day, and the next day turning it on I came across this problem.

File: \Windows\System32\Drivers\nqgbwc.sys

Status: 0xc0000225

Info: Windows failed to load because a critical system driver is missing, or corrupt.

I have no clue what this means. It said insert windows installation disc and repair computer. I did this, self repair found nothing. I then tried system restore and it could not initialize which is a pain in the ass. My last resort is to reinstall windows vista but I think I'm going to lose everything. :(

If anyone has any advice or suggestions it would be greatly appreciated.

Thank you,

My Computer


Nvidia and Intel
Power User
First see if you can boot into Safemode without it giving you that error. If you can, first try searching for that driver to see if its even in your system32 folder.

I recently just checked my computer and it is not in mine by default, which means its a file relating to a third party program/app that has been installed on your machine. If you can figure out what the abbreviation for NQGBWC is from the list of installed applications on your computer, then you can isolate which program on startup is causing the failure on booting windows due to the missing system file.

As you may have already tried, i cannot simply google search nqgbwc.sys as it gives me just THIS post only. If you cannot find the problem, then the only thing possible from there is to reinstall your OS but of course BACK UP EVERYTHING IMPORTANT FIRST.

My Computer

System One

  • Manufacturer/Model
    JUST ME/Custom Built
    Intel(R) Core(TM) 2 Quad Q9550 E0 2.83 Ghz @ 4037.5 Ghz
    8 Gig Corsair XMS3 DHX 1600 Mhz DDR3 CAS 9
    Graphics Card(s)
    2x GTX 480's w/ Koolance VID-NX480's
    Sound Card
    Creative SoundBlaster X-Fi Titanium (non-Fatal1ty) Edition
    Monitor(s) Displays
    Acer P243W 24" Premium Series
    Screen Resolution
    1920 x 1200
    Hard Drives
    Seagate Barracuda 7200.11 1 TB HDD 32mb cache
    (3 Platters, 6 Heads model)
    Ultra X4 1050W PSU 76A Rated 12V SLI
    Antec 1200 Full tower ATX case
    x2 Thermaltake Blue LED 120mm 2800rpm fans, Zalman CNPS 9900
    Logitech LX310 2.4Ghz Wireless Laser Mouse
    Logitech LX310 2.4 Ghz Wireless Keyboard
    Internet Speed
    32mb Download, 12mb Upload from Comcast
    Other Info
    300$ custom watercooling setup. Antec 1200 big boy Radiator, Dual bay XPSC reservoir with clear bubble window, OCZ hydropulse 800L/H 12v pump, 12 ft tygon 1/2" ID, 3/4" OD tubing, Feser One UV Green 1 L fluid. (and VID-NX480 waterblock)

Capt.Jack Sparrow

The Black Pearl
Vista Guru
Hello !!

It doesn't look like a System Driver or Device Driver. Go to C:\Windows\System32\Drivers\ and search that Driver and Right Click properties and under Details it will mention the manufacture see if that is a valid one. If its not then rename nqgbwc.sys to nqgbwc.bak and reboot your PC

Also Download Malwarebytes and run a Complete scan to make sure it comes clean.

Hope this helps,

My Computer