A Lenovo Thinkpad T440p computer recently crashed with a BSOD.

I started looking for clues in Event Viewer and found:

Log Name:      System
Source:        Microsoft-Windows-WER-SystemErrorReporting
Event ID:      1001
Task Category: None
Level:         Error
Keywords:      Classic
The computer has rebooted from a bugcheck.  The bugcheck was: 0x0000001a (0x0000000000041792, 0xffff808000082f70, 0x0004000000000000, 0x0000000000000000). A dump was saved in: C:\WINDOWS\MEMORY.DMP.


Decided to examine the memory dump, so started WinDbg (x64) and opened:


This message was displayed:

BugCheck 1A, {41792, ffff808000082f70, 4000000000000, 0}

Probably caused by : memory_corruption


Checked for more details with:

!analyze -v

Part of the result:

*                                                           *
*                    Bugcheck Analysis                      *
*                                                           *

# Any other values for parameter 1 must be individually examined.
Arg1: 0000000000041792, A corrupt PTE has been detected. Parameter 2 contains the address of
the PTE. Parameters 3/4 contain the low/high parts of the PTE.
Arg2: ffff808000082f70
Arg3: 0004000000000000
Arg4: 0000000000000000


This issue indicated hardware failure, most likely defective memory.

So I booted Memtest86+ from a USB drive.

Within few minutes it found multiple errors.


Tried cleaning the contacts on the memory modules, but it had no effect.


Then I tested each memory module separately in both sockets.

In every case the memory test found errors.


Decided to test another 8 GB memory module.

Ran Memtest86+ all night and it found no errors on the replacement memory module.


A computer that crashes with a MEMORY_MANAGEMENT (1a) BSOD likely has defective memory.

Test the memory with Memtest86+ or another testprogram.

Then replace any identified defective memory modules.