BSOD that changed resolution and restarted computer

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Seeing the usual causes of this error code, it is usually hard to diagnose.

Code:

STOP 0x0000007F: UNEXPECTED_KERNEL_MODE_TRAP  http://carrona.org/bsodindx.html#0x0000007F

Usual causes:  Memory corruption, Hardware (memory in particular), Overclocking failure, Installing a faulty or mismatched hardware (especially memory) or a failure after installing it, 3rd party firewall, Device drivers, SCSI/network/BIOS updates needed, Improperly seated cards, Incompatible storage devices, Overclocking, Virus scanner, Backup tool, Bad motherboard, Missing Service Pack

We start with the basics:

Perform a clean install of your ATI driver:

Code:

Driver	c:\windows\system32\drivers\atikmpag.sys (8.14.1.6099, 184.50 KB (188,928 bytes), 4/16/2010 9:11 AM)

Sometimes drivers remain, not completely uninstalled. Follow this tutorial for complete removal of drivers of the particular program:

• How to Clean Left Over Driver Files with Driver Sweeper

Latest AMD Catalyst Video Driver for Windows 7

AVG can be a contributor to BSOD's. Please remove it using its removal tool from here: Uninstallers (removal tools) for common antivirus software - ESET Knowledgebase

Code:

Start Menu\Programs\AVG	Public:Start Menu\Programs\AVG	Public

We recommended Microsoft Security Essentials from a strict BSOD perspective. Is most compatible & provides most stability compared to other antivirus app/Internet Security Software.

• Microsoft Security Essentials, Free antivirus for windows
• Malwarebytes Anti-Malware Free
• Good and Free system security combination

   Warning

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.

Please uninstall DAEMON Tools and any Alcohol % software. It uses a driver called sptd.sys which is known to cause BSODs in Windows 7. Uninstall the software using Add/Remove Programs. Reboot the system. Once the program is uninstalled, run sptd.sys uninstaller to remove the driver from your system.

Code:

Start Menu\Programs\DAEMON Tools Lite	Public:Start Menu\Programs\DAEMON Tools Lite	Public

As an alternative, many people recommend the use of Total Mounter or Magic ISO

We do not recommend 3rd party defragging programs. Please uninstall:

Code:

Start Menu\Programs\Defraggler	Public:Start Menu\Programs\Defraggler	Public

• Disk Defragmenter - Open and Use
• Uninstall or change a program

Number down items at start-up. Keep only your anti-virus, this also improves the time for logging into windows.

• Click on the Start button
• Type “msconfig (without quotes), click the resulting link. It will open the System Configuration window.
• Select the “Startup” tab.
• Deselect all items other than the antivirus.
• Apply > OK
• Accept then restart.

Full tutorial:

• Startup Programs - Change
• Troubleshoot Application Conflicts by Performing a Clean Startup

Perform a System File Check to check the integrity of all protected Windows 7:

• Click Start Menu
• Click All Programs
• Click Accessories
• Right click Command Prompt
• Click Run as administrator
• Type
• Code:

  sfc /scannow

• and press Enter

Full tutorial here:

• SFC /Scannow Command - System File Checker

Check your hard drive(s) for errors by running chkdsk

• Check your hard disk for errors
• Disk Check
• Check a drive for errors

Take memtest. Run for 8 passes and test each stick in a know good slot for an additional 6 passes.

• RAM - Test with Memtest86+

   Note

Pay close attention to part 3 of the tutorial in order to rule out the faulty stick.

   Information

Errors are sometimes found after 8 passes.

   Tip

Do this test overnight, before going to bed.

If Memtest86+ does not find any errors with ram run Windows Memory Diagnostics for 7-8 passes following its tutorial:

• Memory Diagnostics Tool

Keep us posted of the results.