BSOD after switching antivirus

Welcome to Seven Forums,

Reduce the start-up items, Antivirus software is basically whats required.

• Remove Startup Programs in Windows 7
• Clean Startup in Windows 7

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Avast! can be a reason for bsods. Please remove it and use Microsoft Security Essentials & the Free version of Malwarebytes, update and make full scans separately:

• Uninstallers (removal tools) for common antivirus software - ESET Knowledgebase
• Help protect your PC with Microsoft Security Essentials
• Malwarebytes Free

   Note

Do not start the trial version of MalwareBytes

You may also take a look at:

• Good & Free System Security Combination

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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:

• Click on the
• Type CMD on Search
• Left click and Run as Administrator
• Type SFC /scannow - read here

Run Disk Check on your Hard Drive for file system errors and bad sectors on it - read here
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Upload a screenshot using:

• CrystalDiskInfo For how to upload a screenshot or file, read here

Test your Hard Drive(s) by running:

• Hard Drive Diagnostic Procedure

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Test and Diagnose RAM Issues with Memtest86+:

• RAM - Test with Memtest86+

   Tip

• Pay close attention to Part 3 of the tutorial "If you have errors"
• Test the RAM with Memtest86+ for at least 7-10 passes. It may take up to 22 passes to find problems. Make sure to run it once after the system has been on for a few hours and is warm, and then also run it again when the system has been off for a few hours and is cold.

BSOD BUGCHECK

Code:

Windows 7 Kernel Version 7601 (Service Pack 1) MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7601.18229.amd64fre.win7sp1_gdr.130801-1533
Machine Name:
Kernel base = 0xfffff800`03610000 PsLoadedModuleList = 0xfffff800`038536d0
Debug session time: Tue Sep 17 04:00:30.335 2013 (UTC + 6:00)
System Uptime: 0 days 0:21:22.210
Loading Kernel Symbols
...............................................................
................................................................
................................................................
.....................
Loading User Symbols
Loading unloaded module list
.....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 1A, {403, fffff6800002ca78, a7e00001468da867, fffff6800002ba8a}

Probably caused by : win32k.sys ( win32k!SURFACE::bDeleteSurface+3c8 )

Followup: MachineOwner
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Windows 7 Kernel Version 7601 (Service Pack 1) MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7601.18229.amd64fre.win7sp1_gdr.130801-1533
Machine Name:
Kernel base = 0xfffff800`0361c000 PsLoadedModuleList = 0xfffff800`0385f6d0
Debug session time: Tue Sep 17 02:42:44.005 2013 (UTC + 6:00)
System Uptime: 0 days 0:46:08.879
Loading Kernel Symbols
...............................................................
................................................................
................................................................
..........................
Loading User Symbols
Loading unloaded module list
.....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 3B, {c0000005, fffff8000373ec18, fffff8802327eae0, 0}

Probably caused by : memory_corruption ( nt!MiUnlinkPageFromBadList+38 )

Followup: MachineOwner
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