Have you tried updating the chipset? Dell might have the download, or go to Intel if it is an Intel board.
http://downloadcenter.intel.com/default.aspx?lang=eng
I would also uninstall Speedfan since it is useless for you, and I would still be suspicious of the Adobe Type Manager File Driver.
Process running is the Search Indexer -- so you might want to disable that.
[QUOTE
BUGCHECK_STR: 0xC1_23
SPECIAL_POOL_CORRUPTION_TYPE: 23
CUSTOMER_CRASH_COUNT: 4
DEFAULT_BUCKET_ID: COMMON_SYSTEM_FAULT
PROCESS_NAME: searchprotocolh
]IMAGE_NAME: memory_corruption
FAILURE_BUCKET_ID: 0xC1_23_nt!MmFreeSpecialPool+29b
BUCKET_ID: 0xC1_23_nt!MmFreeSpecialPool+29b
Followup: MachineOwner
---------
kd> kv (display backtrace)
*** WARNING: Unable to verify timestamp for smwdm.sys
*** ERROR: Module load completed but symbols could not be loaded for smwdm.sys
*** WARNING: Unable to verify timestamp for e100b325.sys
*** ERROR: Module load completed but symbols could not be loaded for e100b325.sys
*** WARNING: Unable to verify timestamp for nv4_disp.dll
*** ERROR: Module load completed but symbols could not be loaded for nv4_disp.dll
*** WARNING: Unable to verify timestamp for ATMFD.DLL
*** ERROR: Module load completed but symbols could not be loaded for ATMFD.DLL
*** WARNING: Unable to verify timestamp for nv4_mini.sys
*** ERROR: Module load completed but symbols could not be loaded for nv4_mini.sys
*** ERROR: Symbol file could not be found. Defaulted to export symbols for drmk.sys -
*** WARNING: Unable to verify timestamp for dfmirage.sys
*** ERROR: Module load completed but symbols could not be loaded for dfmirage.sys
*** WARNING: Unable to verify timestamp for GEARAspiWDM.sys
*** ERROR: Module load completed but symbols could not be loaded for GEARAspiWDM.sys
*** WARNING: Unable to verify timestamp for OMCI.SYS
*** ERROR: Module load completed but symbols could not be loaded for OMCI.SYS
*** WARNING: Unable to verify timestamp for speedfan.sys
*** ERROR: Module load completed but symbols could not be loaded for speedfan.sys
*** WARNING: Unable to verify timestamp for aeaudio.sys
*** ERROR: Module load completed but symbols could not be loaded for aeaudio.sys
*** WARNING: Unable to verify timestamp for giveio.sys
*** ERROR: Module load completed but symbols could not be loaded for giveio.sys
Couldn't resolve error at 'display backtrace)'
[/QUOTE]