BSOD at random times when not using computer, ntoskrnl.exe

Code:

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Use !analyze -v to get detailed debugging information.

BugCheck 7A, {fffff6fb80008000, ffffffffc000000e, 5d8f5880, fffff70001000000}

Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+36c1a )

Followup: MachineOwner
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1: kd> !analyze -v
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KERNEL_DATA_INPAGE_ERROR (7a)
The requested page of kernel data could not be read in.  Typically caused by
a bad block in the paging file or disk controller error. Also see
KERNEL_STACK_INPAGE_ERROR.
If the error status is 0xC000000E, 0xC000009C, 0xC000009D or 0xC0000185,
it means the disk subsystem has experienced a failure.
If the error status is 0xC000009A, then it means the request failed because
a filesystem failed to make forward progress.
Arguments:
Arg1: fffff6fb80008000, lock type that was held (value 1,2,3, or PTE address)
Arg2: ffffffffc000000e, error status (normally i/o status code)
Arg3: 000000005d8f5880, current process (virtual address for lock type 3, or PTE)
Arg4: fffff70001000000, virtual address that could not be in-paged (or PTE contents if arg1 is a PTE address)

Code:

ERROR_CODE: (NTSTATUS) 0xc000000e - A device which does not exist was specified.

DISK_HARDWARE_ERROR: There was error with disk hardware

BUGCHECK_STR:  0x7a_c000000e

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN7_DRIVER_FAULT

PROCESS_NAME:  smss.exe

CURRENT_IRQL:  0

Please upload your msinfo32.nfo file. To get this: Start Menu -> Type msinfo32 into the Search programs and files box -> When it opens, go to File, Save -> Save as msinfo32.nfo and save in a place you will remember -> Let it finish the process of gathering and saving the system info -> Right click the .nfo file, click send to compressed (zipped) folder -> Upload the .zip file here.

Please upload your msinfo32.txt file. To get this: Start Menu -> Type msinfo32 into the Search programs and files box -> When it opens, go to File, Export -> Save as msinfo32.txt and save in a place you will remember -> Let it finish the process of gathering and saving the system info -> Right click the .txt file, click send to compressed (zipped) folder -> Upload the .zip file here.

Hard Drive/Storage

Post a screen shot using Crystal Disk Info: CrystalDiskInfo Standard Edition

How to Upload and Post a Screenshot and File in Seven Forums

Make a hard drive test from the hard drive manufacturers website: Hard Drive Diagnostic Procedure

Basic checks: Please run these tests and report back the results

1. SFC /scannow to check windows for corruption - SFC /SCANNOW Command - System File Checker
2. Disk check for errors on the hard drive - How to Run Disk Check in Windows 7
3. Troubleshoot applications by a clean boot - Troubleshoot Application Conflicts by Performing a Clean Startup
4. Memtest86+ paying close attention to part 3 - RAM - Test with Memtest86+
5. Hard drive test from HDD mfg website - Hard Drive Diagnostic Procedure

Thanks for the files.

Security App
Do you have any antivirus or security suite installed? If yes, Remove them and replace with Microsoft Security Essentials to see if it provides more stability. Uninstallers (removal tools) for common antivirus software

Microsoft Security Essentials and Malwarebytes, both recommended from a strict BSOD perspective.

Microsoft Security Essentials, Free antivirus for windows

Malwarebytes Anti-Malware Free

   Information

DO NOT start the free trial of MalwareBytes. Deselect the option when prompted.

   Tip

Make full scans with both separately.

Virus check
Scan your system with the following:

Kaspersky TDSSKiller - How to remove malware belonging to the family Rootkit.Win32.TDSS (aka Tidserv, TDSServ, Alureon)

ESET online scanner - One-time virus scanner free with ESET online scanner

Start up
Keep less stuff at the start-up. Only anti-virus, this helps avoid driver conflicts and improves time to log in to windows.

Troubleshoot a Problem by Performing a Clean Startup in Windows 7 or Vista
How to Change, Add, or Remove Startup Programs in Windows 7

HOw are things?