Windows 7 BlueScreen 1a problem

Solution
Code:
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*                        Bugcheck Analysis                                    *
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Use !analyze -v to get detailed debugging information.

BugCheck 1A, {41201, fffff6800009df80, e3f00000001bf867, fffffa8002fdf880}

Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+13bf2 )

Followup:     MachineOwner
Hi,
this bugcheck can indicate memory issues although I can see from your Microsoft version number from...
Code:
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 1A, {41201, fffff6800009df80, e3f00000001bf867, fffffa8002fdf880}

Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+13bf2 )

Followup:     MachineOwner
Hi,
this bugcheck can indicate memory issues although I can see from your Microsoft version number from Windows 7 that your missing a critical service pack

Please update your with service pack 1:
https://support.microsoft.com/en-gb/help/15090/windows-7-install-service-pack-1-sp1

If the bsod continues then you'll need to test your RAM. Windows does have a memory testing app but it can miss errors and the best app for the job is Memtest86.
If you open the link below you'll see you can run Memtest86 in two ways. You can either burn it to disk or install it onto a USB drive it's entirely up to you. You'll then need to enter the bios to change the boot order so you can boot from either the Disk or USB stick you have Memtest86 on.
You must test for at least 12 hours unless it becomes obvious there is a problem straight away.
Memtest86+ - Advanced Memory Diagnostic Tool
 
Solution