Windows 7 x64 Pro Blue Screen Intermittent on new system

I created a workstation recently, and noticed that sometimes it gets a blue screen.  Error message:

Windows has recovered from an unexpected shutdown
Problem signature:
  Problem Event Name:    BlueScreen
  OS Version:    6.1.7601.
  Locale ID:    1033
Additional information about the problem:
  BCCode:    50
  BCP1:    FFFFF940C27298A0
  BCP2:    0000000000000000
  BCP3:    FFFFF9600007263C
  BCP4:    0000000000000005
  OS Version:    6_1_7601
  Service Pack:    1_0
  Product:    256_1
Files that help describe the problem:

System detail:

Windows 7 Professional SP1
Processor: Intel Core i5-4570 CPU @ 3.20GHz
Installed RAM: 8.00GB
System Type: 64-bit Operating System
Main Logic Board: ASUS B85M-E/CSM
DIMM: Patriot Viper 8GB DDR3 PC3-12800 16MHz
Storage: Samsung SSD 840EVO SATA 120GB
Storage Controller: Intel 8 Series/C220 SATA AHCI, Driver
Monitors: 3x LG 27EA33V-B
Integrated video: Intel HD Graphics 4600, Driver
Network: 1GbE Realtek, Driver 7.67.1226.2012

It has IE 11.0.9600.17107, however I don't normally use it, I rather use Firefox 29.0.1, but only for email and 4 web sites; I don't do any surfing.

I only have MS Security Essentials installed, and set for auto updates.  IE has autoupdated only once, with 11.0.8 update.  Windows has already updated several times.

Hopefully I can attach the 2 related error files mentioned in the message above.  I placed this in Performance and Maintenance category, as that seemed the closest to this issue.  Can someone please help me get to root cause on this problem?



P.S. I saw no opportunity to attach files, this might have to go to private message.


Yes, thank you!

The attached DMP file is of the PAGE_FAULT_IN_NONPAGED_AREA (50) bug check.

This indicates that invalid system memory has been referenced.

Bug check 0x50 usually occurs after the installation of faulty hardware or in the event of failure of installed hardware (usually related to defective RAM, be it main memory, L2 RAM cache, or video RAM).

Another common cause is the installation of a faulty system service.

Antivirus software can also trigger this error, as can a corrupted NTFS volume.


1. Uninstall Asus PC Probe as well as any other Asus bloatware ASAP.

2. Run Memtest for NO LESS than ~8 passes (several hours):


Download Memtest86+ here:

Which should I download?

You can either download the pre-compiled ISO that you would burn to a CD and then boot from the CD, or you can download the auto-installer for the USB key. What this will do is format your USB drive, make it a bootable device, and then install the necessary files. Both do the same job, it's just up to you which you choose, or which you have available (whether it's CD or USB).

Do note that some older generation motherboards do not support USB-based booting, therefore your only option is CD (or Floppy if you really wanted to).

How Memtest works:

Memtest86 writes a series of test patterns to most memory addresses, reads back the data written, and compares it for errors.

The default pass does 9 different tests, varying in access patterns and test data. A tenth test, bit fade, is selectable from the menu. It writes all memory with zeroes, then sleeps for 90 minutes before checking to see if bits have changed (perhaps because of refresh problems). This is repeated with all ones for a total time of 3 hours per pass.

Many chipsets can report RAM speeds and timings via SPD (Serial Presence Detect) or EPP (Enhanced Performance Profiles), and some even support changing the expected memory speed. If the expected memory speed is overclocked, Memtest86 can test that memory performance is error-free with these faster settings.

Some hardware is able to report the "PAT status" (PAT: enabled or PAT: disabled). This is a reference to Intel Performance acceleration technology; there may be BIOS settings which affect this aspect of memory timing.

This information, if available to the program, can be displayed via a menu option.

Any other questions, they can most likely be answered by reading this great guide here:



Debugger/Reverse Engineer.

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Question Info

Last updated June 22, 2018 Views 538 Applies to: