Blue screen while switching users

Hello and Welcome !

Seems like both the Dump files are pointing to Memory. I would recommend Run a Hardware Diagnostic (Memory and Hard Drive) follow this link for instructions Hardware Diagnostic !! « Captain Debugger

Update the following Driver

Code:

Rt64win7.sys Thu Feb 26 14:34:13 2009

Bugcheck

Code:

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

MEMORY_MANAGEMENT (1a)
    # Any other values for parameter 1 must be individually examined.
Arguments:
Arg1: 0000000000041790, The subtype of the bugcheck.
Arg2: fffffa8000fa07d0
Arg3: 000000000000ffff
Arg4: 0000000000000000

Debugging Details:
------------------


BUGCHECK_STR:  0x1a_41790

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

PROCESS_NAME:  LogonUI.exe

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from fffff80002aea058 to fffff80002a76740

STACK_TEXT:  
fffff880`099b71d8 fffff800`02aea058 : 00000000`0000001a 00000000`00041790 fffffa80`00fa07d0 00000000`0000ffff : nt!KeBugCheckEx
fffff880`099b71e0 fffff800`02a4968a : fffffa80`062837e0 fffffa80`00000006 fffff8a0`00000252 00000000`00000000 : nt! ?? ::FNODOBFM::`string'+0x339c8
fffff880`099b7a90 fffff800`02d5bdcf : fffff8a0`0837fc50 00000000`00000001 00000000`00000000 fffffa80`0690f690 : nt!MmCleanProcessAddressSpace+0x96
fffff880`099b7ae0 fffff800`02d3385b : 00000000`00000000 00000000`00000001 000007ff`fffde000 00000000`00000000 : nt!PspExitThread+0x92f
fffff880`099b7ba0 fffff800`02a75993 : fffffa80`062837e0 fffff880`00000000 00000000`003e3730 fffffa80`0690f690 : nt!NtTerminateProcess+0x25b
fffff880`099b7c20 00000000`77c0001a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`0020fb68 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x77c0001a


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nt! ?? ::FNODOBFM::`string'+339c8
fffff800`02aea058 cc              int     3

SYMBOL_STACK_INDEX:  1

SYMBOL_NAME:  nt! ?? ::FNODOBFM::`string'+339c8

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrnlmp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  4c1c44a9

FAILURE_BUCKET_ID:  X64_0x1a_41790_nt!_??_::FNODOBFM::_string_+339c8

BUCKET_ID:  X64_0x1a_41790_nt!_??_::FNODOBFM::_string_+339c8

Followup: MachineOwner

Hope this helps,
Captain

I agree with Captain: that Realtek driver needs an update. Here is a download link: Realtek

Update your ATI graphics drivers as well. Here is a link: https://a248.e.akamai.net/f/674/9206...win7_64_dd.exe

Finally, remove Gigabyte's Easy Saver program, notorious for causing BSODs:

Code:

gdrv.sys     Thu Mar 12 23:22:29 2009

Go to Programs and Features and Uninstall it.

If you get more BSODs, please enable driver verifier. Here is my tutorial for it: Driver Verifier - Enable and Disable

...Summary of the Dumps:

Code:

Built by: 7600.16617.amd64fre.win7_gdr.100618-1621
Debug session time: Tue Aug 31 12:27:40.693 2010 (UTC - 4:00)
System Uptime: 0 days 0:03:28.145
BugCheck 1A, {41790, fffffa8000cb7120, ffff, 0}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+33906 )
BUGCHECK_STR:  0x1a_41790
PROCESS_NAME:  drvinst.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
Built by: 7600.16617.amd64fre.win7_gdr.100618-1621
Debug session time: Mon Aug 30 15:49:52.536 2010 (UTC - 4:00)
System Uptime: 0 days 9:19:17.987
BugCheck 1A, {41790, fffffa8000fa07d0, ffff, 0}
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+339c8 )
BUGCHECK_STR:  0x1a_41790
PROCESS_NAME:  LogonUI.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨

Thanks for the update!

Glad to hear it's all sorted out.