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Windows 7: Random BSOD: BCCODE 50

07 Dec 2011   #1

Windows 7 Professional 64b
Random BSOD: BCCODE 50

Hello all,
I am getting BSODs and I do not know what else to do. I tried everything that came up to my mind. Brief history of the issue:
Had Windows Vista installed and decided that would be good to update to Windows 7. I replaced my old hard drive (fully functional) with a SSD (just for the OS) and a brand new 2TB HD. BSODs started coming up randomnly: playing video, browsing the web, doing nothing..... I tried debugging this issue from a HW point of view: disconnected the video card (the motherboard has one built-in), removed half the RAM (then put it back in and removed the other half), replaced the new drives with the old one and re-installed Windows 7, etc... the only thing I could not remove was the motherboard and the processor. From a software point of view, I re-installed Windows 7 several times and updated all the drivers in the system. Last thing I tried: put in the old HD and re-installed Windows Vista (just what I had before I decided to upgrade the system). In all cases, including the last one (Vista), I get random BSODs.

I followed the instructions and generated the required reports. Please find them as attachment. Also, I zipped the info that comes up next time Windows starts after the BSOD (the last 2 times that happened).

I have Windows 7 Professional Edition 64b SP1. Computer is about 4 years old:
AMD Athlon Dual Core BE2400 2.3GHz
RAM: 2x2Gb
Nvidia GeForce 940GT
Motherboard: GA-MA69GM-S2H

I really need help. Thank you very much in advance.

My System SpecsSystem Spec

07 Dec 2011   #2

Windows 7 Ultimate 64bit SP1


In this order,

Remove Avira from your system.

Download,install and use Microsoft security essentials with windows firewall.

Update the software\driver for Realtek RTL8168D/8111D Family PCI-E Gigabit Ethernet NIC


Run SFC /SCANNOW Command - System File Checker
You may need to run it 2-3 times before "fix" everything.

Run a RAM - Test with Memtest86+
Leave to run overnight.

Finish and post back.
My System SpecsSystem Spec
08 Dec 2011   #3

Windows 7 Professional 64b

Hi panais,
I followed your instructions and everything looks good so far. I will run memtest overnight and will post again tomorrow morning.

Avira was on the system because I thought the BSOD issue had something to do with the antivirus I had before: AVG. Not a big difference though. Hopefully MSE will work better this way.

Updated driver successfully installed.

sfc /scannow command did not report any errors.

I will post memtest results tomorrow morning and, assuming everything works fine from now on, I will post again to confirm it 48 hours later. If the BSOD event does not show up in 48 hours, I am confident the issue is fixed.

Thanks a million!!!
My System SpecsSystem Spec

08 Dec 2011   #4

Windows 7 Ultimate 64bit SP1

So far so good

Finish and as always remember to post back.
My System SpecsSystem Spec
09 Dec 2011   #5

Windows 7 Professional 64b

Hi panais,
I am afraid I am still facing the same issue....memtest reported no errors after 8 hours running. However, I left the computer downloading some files and the BSOD showed up again. Attached files with info for experts.

Any suggestions? Thanks a lot in advance!
My System SpecsSystem Spec
10 Dec 2011   #6

Windows 7 Professional 64b

and new crash.....
My System SpecsSystem Spec
15 Dec 2011   #7

Windows 7 Professional 64b

guys/panais.......anybody out there???
My System SpecsSystem Spec
15 Dec 2011   #8

Windows 7 Ultimate 64bit SP1

Read carefully all the tutorial,then enable driver verifier.

Driver Verifier - Enable and Disable

""After a reboot, driver verifier should be enabled. Use your computer as you normally would, although expect frequent BSODs if there are driver issues. If the system doesn't crash after 24 hours, disable driver verifier.""
My System SpecsSystem Spec
20 Dec 2011   #9

Windows 7 Professional 64b

Hi panais,
I enabled driver verifier and did not notice BSODs more often than as usual - every 24 hours or so if I do not switch off the PC.

Dump files attached......hope they contain usefull information to debug the issue.

Thanks a million!!!
My System SpecsSystem Spec
21 Dec 2011   #10

Windows 8.1 Pro x64

Run Prime 95 to test your CPU. Carefully the instructions in this tutorial: CPU - Stress Test with Prime95. Run 3 separate tests, one on each of the settings (Blend, Small FFTs, Large FFTs). Post back with your results.
Note that this test may overheat the CPU, ensure proper cooling
My System SpecsSystem Spec

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