ntoskrnl.exe causing various BSOD error messages

Hello everyone,

Since yesterday, I've started to get BSOD screens frequently. I tried any tool I could find, but it wouldn't do anything. After further searches, I've found using a dmp reading tool that my blue screens were caused by ntoskrnl.exe. Here are the dump files in text:

Code:

==================================================
Dump File         : 010811-19219-01.dmp
Crash Time        : 08/01/2011 12:59:58 PM
Bug Check String  : PAGE_FAULT_IN_NONPAGED_AREA
Bug Check Code    : 0x00000050
Parameter 1       : fffff8a0`00579000
Parameter 2       : 00000000`00000000
Parameter 3       : fffff800`02ecb83a
Parameter 4       : 00000000`00000000
Caused By Driver  : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+66580
File Description  : NT Kernel & System
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.1.7600.20738 (win7_ldr.100618-1621)
Processor         : x64
Computer Name     : 
Full Path         : C:\Windows\Minidump\010811-19219-01.dmp
Processors Count  : 2
Major Version     : 15
Minor Version     : 7600
Dump File Size    : 269,728
==================================================

==================================================
Dump File         : 010811-25911-01.dmp
Crash Time        : 08/01/2011 12:39:58 PM
Bug Check String  : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code    : 0x0000000a
Parameter 1       : 00000000`00000000
Parameter 2       : 00000000`00000002
Parameter 3       : 00000000`00000000
Parameter 4       : fffff800`02ea7436
Caused By Driver  : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description  : NT Kernel & System
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.1.7600.20738 (win7_ldr.100618-1621)
Processor         : x64
Computer Name     : 
Full Path         : C:\Windows\Minidump\010811-25911-01.dmp
Processors Count  : 2
Major Version     : 15
Minor Version     : 7600
Dump File Size    : 275,784
==================================================

==================================================
Dump File         : 010811-20202-01.dmp
Crash Time        : 08/01/2011 12:38:24 PM
Bug Check String  : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code    : 0x0000000a
Parameter 1       : 00000000`00000000
Parameter 2       : 00000000`00000002
Parameter 3       : 00000000`00000000
Parameter 4       : fffff800`02eaa436
Caused By Driver  : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description  : NT Kernel & System
Product Name      : Microsoft® Windows® Operating System
Company           : Microsoft Corporation
File Version      : 6.1.7600.20738 (win7_ldr.100618-1621)
Processor         : x64
Computer Name     : 
Full Path         : C:\Windows\Minidump\010811-20202-01.dmp
Processors Count  : 2
Major Version     : 15
Minor Version     : 7600
Dump File Size    : 275,840
==================================================

==================================================
Dump File         : 010811-26629-01.dmp
Crash Time        : 08/01/2011 11:37:46 AM
Bug Check String  : KMODE_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x0000001e
Parameter 1       : ffffffff`c0000005
Parameter 2       : fffff800`02e77cd8
Parameter 3       : 00000000`00000000
Parameter 4       : ffffffff`ffffffff
Caused By Driver  : atikmdag.sys
Caused By Address : atikmdag.sys+3788cc
File Description  : 
Product Name      : 
Company           : 
File Version      : 
Processor         : x64
Computer Name     : 
Full Path         : C:\Windows\Minidump\010811-26629-01.dmp
Processors Count  : 2
Major Version     : 15
Minor Version     : 7600
Dump File Size    : 275,840
==================================================

These are only 4 of them (the other ones were from yesterday and disappeared). As you can see, the BSOD error messages are different.

Anyway, I tried Googling but I can't find anyone with a similar problem to mine.

Thank you for helping me!

Edit: I forgot to add: the BSOD appears randomly. Somtimes on the Windows 7 logo booting screen, sometimes after a few minutes or hours. Even sometimes there's no BSOD screen at all, it just completely freezes and I have to shut down my computer.

https://www.sevenforums.com/crashes-d...tructions.html

Sorry for the late reply, I had a terribly long shift at work today.

Here are the infos required:

- x64.
- Originally Windows Vista Ultimate 64-bit.
- Full retail version.
- Hardware around a year and a half old.
- OS around 6-7 months old.

Thank you for looking into my problem, I don't want to format once again. :S

Dumps point to your GPU drivers, atikmdag.sys

- Boot into safe mode with networking
- Uninstall the ATI drivers including Catalyst Control Center
- Use driver sweeper to remove leftover ATI display driver files Guru3D - Driver Sweeper
- Reboot in safe mode with networking
- Install the latest drivers ATI Radeon
- Reboot into normal mode

Code:

BugCheck 1E, {ffffffffc0000005, fffff80002e77cd8, 0, ffffffffffffffff}

Unable to load image \SystemRoot\system32\DRIVERS\atikmdag.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for atikmdag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmdag.sys
Probably caused by : atikmdag.sys ( atikmdag+3ca1d6 )