I have a Dell Studio One 1909 All-in-One computer that infrequently has BSOD Stop 50.
The BSOD seems to happen when the computer is restarted/or within windows when a USB flash drive/external drive is plugged in.(USB mouse and keyboard are fine) I have restarted over 10 times fine without various flash drives plugged in fine. When I connect a USB flash drive the BSOD then will occasionally come up. (May be coincidental?) The BSOD's don't happen in Windows and only when you restart/turn on the computer when the Windows logo appears.
I have updated the BIOS and drivers. The computer does have Norton 360 which does seem to be working, but I can uninstall it if needed. I ran Memtest with 14 passes good and the Hard Drive passed the long test with WD Diag. The computer has Windows 7 Home 64bit installed. I have scanned for viruses using many different Anti-viruses and it did find some, but only PUP's. I ran chkdsk /r which fixed some and sfc /scannow which came up with no errors.
The computer ran BurnInTest Pro 7.0 for an entire day without a single BSOD. The temps were fine as well.
Attached is the SF Diagnostic Tool.
My Computer
At a glance
Windows 7 Home 64bitCore 2 Duo E8500 @ 2.8Ghz4GB DDR2Nvidia 9400
First off, download and run MemTest86+ to test your RAM.
Note
Run MemTest86+ for at least 8 passes. Ideally set it off before you go to bed and leave it overnight, we're looking for zero errors here. A single error will show something's going bad with your RAM.
My Computer
At a glance
W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x6...i7-4790k @ 4GHz (4.4GHz Boost)16GB DDR3 Kingston HyperX Fury @ 1600MHz CL 9...EVGA GTX 980 Classified
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM
Sorry I wasn't clear in my post, but I did use Memtest86+ Ver4.20 and got 14 passes good. I noticed in your link they had Ver5.01 so I will download that and let it run. I'll give updates when it finishes.
My Computer
At a glance
Windows 7 Home 64bitCore 2 Duo E8500 @ 2.8Ghz4GB DDR2Nvidia 9400
Enable Driver Verifier but only enable these options:
Standard settings and IRP logging step 3. Don't enable Force Pending I/O Requests
Warning
Make a System Restore point before enabling Driver Verifier.
Note
Your system will act very sluggishly while DV is enabled, this is normal as your drivers will be being subjected to heavy testing in order to make them crash.
My Computer
At a glance
W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x6...i7-4790k @ 4GHz (4.4GHz Boost)16GB DDR3 Kingston HyperX Fury @ 1600MHz CL 9...EVGA GTX 980 Classified
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM
I went through the tutorial and I didn't enable Force Pending I/O requests like you said. It booted up fine so I will run BurnIntest for 24hours and plug in some flashdrives to see if a BSOD happens.
My Computer
At a glance
Windows 7 Home 64bitCore 2 Duo E8500 @ 2.8Ghz4GB DDR2Nvidia 9400
Thanks for all your help so far! Alas, it has been running BurnInTest all day and with repeated restarts I am not getting another BSOD. (It's just too infrequent and with little info on it)
I'm starting to think it's a hardware problem, but for now I will deal with the occasion BSOD since the computer is older.
Thanks for all your input and time.
My Computer
At a glance
Windows 7 Home 64bitCore 2 Duo E8500 @ 2.8Ghz4GB DDR2Nvidia 9400