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Windows 7: BSOD pagefault in nonpaged area 0x00000050 ntoskrnl.exe+75bc0

09 Dec 2014   #1

Windows 7 Home Premium 64 bit
BSOD pagefault in nonpaged area 0x00000050 ntoskrnl.exe+75bc0


I have a new user built PC with fresh install of windows 7 home premium 64 bit. I have the bare minimum of programs installed such as Adobe Reader XI, Panda Free Antivirus, Google Chrome, and HDHomerun. I also have two external hard drives with data/media. In addition to receiving BSOD about once or twice per day (often while the PC is idle), I have also noticed Windows Media Center is disconnecting from my xbox 360 extender after a few minutes. Not sure if that is a separate issue or not.

Windows is fully updated with automatic updates turned on.
Most drivers were from motherboard support disc and most are updated.
All firmware is updated I believe.
Memtest 86+ 5.01 passes 10 times (overnight) with zero errors.
Seatools and dskchk show no hard drive errors (i tested them all).
Furmark and Intel Burn test were run for about 30 minutes with no crashes, artifacts or lockups.
I replaced the power supply for good measure--no changes.

I'm really at a loss--I feel I've tested all hardware sufficiently, but if I'm missing something please help. I'm thinking it's a software issue/conflict, but I'm almost bare bones so can't figure out what.

Thanks for lending your expertise to my problem. I appreciate any assistance you can offer. Thanks, Tim

i5-4670k stock
ASUS z87pro
XFX r9 270x DD stock
2 x 4gb G.Skill ripjaws x ddr3-1600
Samsung SSD 840 evo 250gb (OS/programs)
Antec 650 trio PS
My System SpecsSystem Spec
09 Dec 2014   #2

Windows 7 Home Premium 64 bit

One other odd thing I have noticed multiple times. I have the monitor set to sleep after 10 minutes, and the computer is set to never sleep. I've found the monitor off after I've been AFK for a while (as it should be after 10 minutes), and when I return and move the mouse or hit the keyboard, the monitor doesn't power on. The mouse light is on, the case power light is on and I hear fans, the disc drives open, etc., but no signal to monitor. Toggling the power on the monitor does nothing. Also, the sleep button on the keyboard does not put the PC to sleep as usual. So it's like it's frozen, but in a way it isn't? This doesn't happen every time, but occasionally.
My System SpecsSystem Spec
09 Dec 2014   #3

Windows 7 Home Premium 64 bit

Had another BSOD while running Prime 95 on blend for about 15 minutes. Don't know if it was coincidence or related. Will run Prime 95 again. Just prior passed two attempts at Intel Processor Diagnostic Tool 64 bit.

Update: ran Prime 95 for another 15-20 minutes, but need to stop to head to bed (don't want it running all night).

CPU temps: idle around 30 degrees C. Under stress test upper 80's C. Not sure if this is too high for this processor? I understand Haswell does run hot. I could reinstall the heatsink/cooler to be safe.

GPU temps: idle around 30 degrees C. Under stress during Furmark 95-100 degrees C. I know this is high, but I understand this isn't unusual for this video card. My case does have good airflow.
My System SpecsSystem Spec

10 Dec 2014   #4

Windows 7 Home Premium 64 bit

Another BSOD to add--same error apparently. Also, system is freezing up as stated before--no response from keyboard or mouse--have to manually hard boot (reset button).
My System SpecsSystem Spec
12 Dec 2014   #5

Windows 7 Home Premium 64 bit

I reinstalled windows again with updated drivers and minimal programs, and already have a BSOD.


I only installed the following:
--intel chipset driver
--realtek audio driver
--intel lan driver
--intel usb 3.0 driver
--amd video driver only (none of the rest of the catalyst suite)
--intel processor diagnostic tool 64 bit

BIOS is updated
I ran memtest 86+ 5.01 for 16 passes with zero errors
I ran processor diagnostic tool three times--pass each time
My System SpecsSystem Spec
12 Dec 2014   #6

Windows 10 Pro/ Windows 10 Pro Insider

Hello, stavesacre03. I have only had a chance to check your first dump upload which includes 2 dump files. Boyj list the following

Use !analyze -v to get detailed debugging information.
BugCheck 50, {fffffa800d305000, 0, fffff8800424af0a, 0}
*** WARNING: Unable to verify timestamp for vuhub.sys
*** ERROR: Module load completed but symbols could not be loaded for vuhub.sys
Could not read faulting driver name
Probably caused by : vuhub.sys ( vuhub+7f0a )
Followup: MachineOwner
start             end                 module name
fffff880`04243000 fffff880`04252000   vuhub    T (no symbols)           
    Loaded symbol image file: vuhub.sys
    Image path: \SystemRoot\system32\DRIVERS\vuhub.sys
    Image name: vuhub.sys
    Timestamp:        Fri Nov 16 09:31:13 2007 (473DB7C1)
    CheckSum:         0000C82F
    ImageSize:        0000F000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
I haven't had a lot of time to check exactly what vuhub,sys exactly is, but indications are that it may be a part of an Asus Router. If you have ab Asus Router, please check for an updated firmware. All indications I have seen so far are that it is some device connected to your computer. There are also indications of I/O errors which normally are a hard drive, but could be your Xbox or a router too.

I'll check back later, hopefully with more information.
My System SpecsSystem Spec
12 Dec 2014   #7

Windows 7 Home Premium 64 bit

Essenbe, first, thank you so much for your assistance. I do have an ASUS rt-n56u router connected to the computer, and to that is an xbox 360 among others. Let me check on firmware for the router.
My System SpecsSystem Spec
12 Dec 2014   #8

Windows 10 Pro/ Windows 10 Pro Insider

Vuhub.sys with description Virtual Usb Hub is a driver file from company ELTIMA Software belonging to product USB to Ethernet Connector.
My System SpecsSystem Spec
12 Dec 2014   #9

Windows 7 Home Premium 64 bit

Interesting. I just updated the router firmware, which was a couple of months old. I do have a Trendnet 4 port switch attached to the router. Could that be the issue?
My System SpecsSystem Spec
12 Dec 2014   #10

Windows 10 Pro/ Windows 10 Pro Insider

Please note the timestamp on it, which is the date of the driver

Fri Nov 16 09:31:13 2007
My System SpecsSystem Spec

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