Blue screen errors: Memory_Management and irql_not_less_or_equal during Windows 7 Startup

Original Title: NEW PC - Putting Together, Multiple Errors and Crashes. Products,Specs,and Symptoms included in detail

I've been having some problems for quite sometime after putting together this computer. I bought everything separately from I can get it to run for awhile then when I play a game or install something over a long period of time. The Computer stops running properly and I start getting errors then the cycle starts over for installing Win7 again etc. I've also had a tech that I work with look at it. I've bought a proper power bar to see if its the power and have raised the computer off the carpet since the power supply is in the bottom of the case. As well the tech took off the washers on the motherboard to ground it to the case better.


Computer Specs

OS: Win7 Home Edition OEM 64 Bit

Motherboard (Tech BIOS Flashed and Updated Everything):
Hard Drive x2 (Both Setup for Separate Drives):
Video card x2 for crossfire:
DDR3:(Have 8GB in Total- 4 Sticks)


Power Supply:



Both of these come up after extended hours of when the computer is on when I install World of Warcraft + Patches and Ventrillo 64 Bit Edition. After I power down and start up all i get is Blue screens.




1. Doesn't Boot Device for USB - As I made a memtest for checking memory.

2. Originally computer didnt start up or POST with two sticks (4GB Total) DDR3 - Needed 8GB for it to start or POST.

3. Tech and I both had problems starting comp up without USB Keyboard plugged in.

4. Crossfire ran Dragon Age: Origins fine for 20 min at a time I tested out the video on high settings.

5. Didn't like AVG 9.0 till the motherboard BIOs was flashed. As I kept getting error messages before. However it liked the M S E before BIOS was flashed and when it crashed after installing WoW+Patch and Ventrillo 64 bit and i managed to get into safe mode that one time multiple programs which i installed had all corrupt files.

Thank you for your help.




First of all, there will be a conflict with the drivers when you use OEM (Original Equipment Manufacturer) discs on a custom built computer. OEM operating disc contains custom drivers for their devices.


Explanation of the stop errors that you receive on a blue screen with basic troubleshooting steps


1. Blue screen stop error: Memory_Management


Memory management stop error indicates a general memory management problem. If you are experiencing this problem, you can use the memory diagnostic tool to determine whether the problems are caused by failing RAM or the memory system of your motherboard.


1.    First of all, check your motherboard manual and manufacturer's site to make sure that the RAM you are using is compatible with the board.

2.    Also, make sure that the RAM sticks you are installing are all identical. Mixing ram with different timings, voltage requirements, etc. will cause this problem.


·         Are all the RAM sticks of the uniform frequency? For instance, if you’ve 800 MHz for one memory stick, are all the RAM sticks of 800 MHz?

·         What is the Power System Unit (PSU) of your computer?


Step 1: Diagnosing memory problems on your computer

Even though you’ve run the memory test, I would ask you to run the built-in memory diagnostic tool in Windows 7. Windows Memory Diagnostic is designed to be easy and fast. On most configurations, you can download the diagnostic, read the documentation, run the test and complete the first test pass in less than 30 minutes.

2. Blue screen stop error: IRQL_NOT_LESS_OR_EQUAL


This error usually occurs after the installation of a buggy device driver, third party service, or BIOS (Basic Input Output System). To resolve it quickly, you can follow these steps.


Step 1: To use Last known good configuration

a.    Use F8 while restarting the computer.

b.    Under Windows Advanced Boot Options, select Last Known Good Configuration (Advanced) and press Enter.

Check if your operating system is now bootable.


Step 2: Update all your device drivers


Additional information:


Resolving stop (blue screen) errors in Windows 7


Hope this information is helpful.
Mouneshwar R – Microsoft Support
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Question Info

Last updated March 14, 2020 Views 5,609 Applies to: