I wonder if your Yukon Ethernet Controller drivers are causing the issue. Please uninstall them, and install a fresh copy.
I agree with Captain- a memory test is in order. Download a copy of Memtest86 and burn the ISO to a CD using Iso Recorder or another ISO burning program. Boot from the CD, and leave it running for at least 5 or 6 passes.
BSOD BUGCHECK SUMMARY
Code:
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Fri Jun 11 18:40:53.148 2010 (GMT-4)
System Uptime: 0 days 0:04:44.272
BugCheck 7F, {8, 80050033, 6f8, fffff88001863e58}
Probably caused by : memory_corruption
BUGCHECK_STR: 0x7f_8
PROCESS_NAME: svchost.exe
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Thu Jun 10 20:35:16.967 2010 (GMT-4)
System Uptime: 0 days 0:06:53.091
BugCheck D1, {5e, 2, 0, fffff88001873157}
*** WARNING: Unable to verify timestamp for yk62x64.sys
*** ERROR: Module load completed but symbols could not be loaded for yk62x64.sys
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : memory_corruption
BUGCHECK_STR: 0xD1
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Wed Jun 9 20:54:12.811 2010 (GMT-4)
System Uptime: 0 days 0:07:29.935
BugCheck 1E, {ffffffffc0000005, fffff8800170e1cf, 0, ffffffffffffffff}
Probably caused by : memory_corruption
BUGCHECK_STR: 0x1E
PROCESS_NAME: svchost.exe
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Tue Jun 8 21:40:13.615 2010 (GMT-4)
System Uptime: 0 days 0:07:15.739
BugCheck 1E, {ffffffffc0000005, fffffa800caa2a4c, 1, 0}
Probably caused by : ntkrnlmp.exe ( nt!KiDispatchException+1b9 )
BUGCHECK_STR: 0x1E
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Mon Jun 7 23:55:44.939 2010 (GMT-4)
System Uptime: 0 days 0:10:15.893
BugCheck 1E, {0, 0, 0, 0}
Probably caused by : USBPORT.SYS ( USBPORT!USBPORT_Core_iMapTransfer+247 )
BUGCHECK_STR: 0x1E
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Sun Jun 6 03:17:25.105 2010 (GMT-4)
System Uptime: 0 days 0:04:28.798
BugCheck 1000007E, {ffffffffc0000005, fffff8800185c357, fffff880033697f8, fffff88003369060}
Probably caused by : tcpip.sys ( tcpip!IppDeliverListToProtocol+27 )
PROCESS_NAME: System
BUGCHECK_STR: 0x7E
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Sat Jun 5 21:36:18.181 2010 (GMT-4)
System Uptime: 0 days 0:08:31.305
BugCheck D1, {0, 2, 1, fffff8800171fe6d}
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : memory_corruption
BUGCHECK_STR: 0xD1
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Fri Jun 4 18:32:24.571 2010 (GMT-4)
System Uptime: 0 days 0:02:20.695
BugCheck D1, {1a, 2, 0, fffff8800185de91}
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : memory_corruption
BUGCHECK_STR: 0xD1
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Thu Jun 3 21:43:19.221 2010 (GMT-4)
System Uptime: 0 days 0:05:59.345
BugCheck 109, {a3a039d89cdeb508, b3b7465eef5b86fe, fffff8000300ae40, 1}
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : memory_corruption
BUGCHECK_STR: 0x109
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ
Built by: 7600.16539.amd64fre.win7_gdr.100226-1909
Debug session time: Tue Jun 1 21:10:06.969 2010 (GMT-4)
System Uptime: 0 days 0:06:39.982
BugCheck D1, {f, 2, 0, fffff8800184314c}
*** WARNING: Unable to verify timestamp for yk62x64.sys
*** ERROR: Module load completed but symbols could not be loaded for yk62x64.sys
*** WARNING: Unable to verify timestamp for win32k.sys
*** ERROR: Module load completed but symbols could not be loaded for win32k.sys
Probably caused by : memory_corruption
BUGCHECK_STR: 0xD1
PROCESS_NAME: System
จจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจจ