Blu screen ERROR WHEN I UWE ETHERNET OF MY MBOARD..GIGABYTE 78LMT-S2PT

HI GUYS PLS HLP ME.....

WHNEVR I USE NET ON MY NEW MBOARD ...GIGABYTE 78LMT-S2PT

I GET BLU SCREEN ERROR AFTER SUMTIME...WAT TO DO...SUMTIMES MY PC ALSO HANGS.....

THER IS NO PROBLEM IF I USE A LAN CARD TO CONNECT TO INTERNET...
PLS HELP


MY SPECS R....

amd 6100 3.3 ghz processor

gigabyte 78LMT-S2PT MOTHERBOARD

4BG CORSAIR RAM

ZOTAC GTX 550TI

500 W I BALL PSU...


THESE R THE ERRORS

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1081

Additional information about the problem:
BCCode: 7f
BCP1: 0000000D
BCP2: 00000000
BCP3: 00000000
BCP4: 00000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\102712-30357-01.dmp
C:\Users\arjit\AppData\Local\Temp\WER-49233-0.sysdata.xml


AGAIN IT HAPPND AND GAV THIS MSG...


Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1081

Additional information about the problem:
BCCode: a
BCP1: 00200073
BCP2: 00000002
BCP3: 00000001
BCP4: 8309906C
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\102712-25365-01.dmp
C:\Users\arjit\AppData\Local\Temp\WER-42135-0.sysdata.xml