BSOD while starting the laptop BCCode:50

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The nfo file you uploaded is corrupted.

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.

Coming to your BSOD-s and bugcheck. They were caused by your antivirus:

Code:

STOP 0x00000050: PAGE_FAULT_IN_NONPAGED_AREA   
Usual causes:  Defective hardware (particularly memory - but not just RAM), 
Faulty system service, Antivirus,  Device driver, NTFS corruption, BIOS
BugCheck 50, {fffff8a00a166000, 0, fffff80003185079, 0}
Unable to load image \SystemRoot\System32\Drivers\aswSnx.SYS, Win32 error 0n2
*** WARNING: Unable to verify timestamp for aswSnx.SYS
*** ERROR: Module load completed but symbols could not be loaded for aswSnx.SYS
Could not read faulting driver name
Probably caused by : aswSnx.SYS ( aswSnx+229e4 )

Code:

STOP 0x00000050: PAGE_FAULT_IN_NONPAGED_AREA   
Usual causes:  Defective hardware (particularly memory - but not just RAM), 
Faulty system service, Antivirus,  Device driver, NTFS corruption, BIOS
BugCheck 50, {fffff8a003d66000, 0, fffff80003144079, 0}
Unable to load image \SystemRoot\System32\Drivers\aswSnx.SYS, Win32 error 0n2
*** WARNING: Unable to verify timestamp for aswSnx.SYS
*** ERROR: Module load completed but symbols could not be loaded for aswSnx.SYS
Could not read faulting driver name
Probably caused by : aswSnx.SYS ( aswSnx+23f9e )

aswSnx.SYS = avast! Virtualization Driver

Avast! antivirus often contributes in BSOD-s. Please uninstall it and replace with Microsoft Security Essentials at least to test.

• avast! Uninstall Utility | Download aswClear for avast! Removal

Recommended antivirus program for Windows 7 based on stability compared to others:-

• Microsoft Security Essentials - Free Antivirus for Windows
• Microsoft Security Essentials Download | Free Spyware Protection
• Malwarebytes - The Free version
• Good and Free system security combination.

Do not start the free trial of Malware Bytes; remember to deselect that option when prompted.

Run a full scan with both (separately) once downloaded, installed and updated.

Run the System File Checker that scans the of all protected Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible:

• SFC /SCANNOW Command - System File Checker

Run Disk Check on your hard disk for file system errors and bad sectors on it:

• Disk Check

Let us know the results and upload the nfo file

Thank you for the update.

Run these and delete any they find:

• Anti-rootkit utility TDSSKiller

ESET online scanner:

• Free Online Virus Scanner | ESET

Have you installed MSE?

You're welcome. Observe for more BSOD-s if there are none in the week ahead, let us know and mark the thread as solved