BSOD random crashes

[nackyelf]

I have recently started getting random crashes and I don't know why. Here are the dump files.
112312-14929-01.dmp11/23/2012 8:27:47 AMKMODE_EXCEPTION_NOT_HANDLED0x0000001e00000000`0000000000000000`0000000000000000`0000000000000000`00000000ndis.sysndis.sys+58308 x64 C:\Windows\Minidump\112312-14929-01.dmp6157601303,433 112212-15958-01.dmp11/22/2012 8:08:43 AMAPC_INDEX_MISMATCH0x0000000100000000`74712e0900000000`0000000000000000`ffff0000fffff880`090e5b60ntoskrnl.exentoskrnl.exe+7efc0NT Kernel & SystemMicrosoft® Windows® Operating SystemMicrosoft Corporation6.1.7601.17944 (win7sp1_gdr.120830-0333)x64ntoskrnl.exe+7efc0 C:\Windows\Minidump\112212-15958-01.dmp6157601293,056 112012-14289-01.dmp11/20/2012 7:23:07 AMSYSTEM_THREAD_EXCEPTION_NOT_HANDLED0x1000007effffffff`c0000005fffff800`030a0861fffff880`009a9898fffff880`009a90f0ntoskrnl.exentoskrnl.exe+41861NT Kernel & SystemMicrosoft® Windows® Operating SystemMicrosoft Corporation6.1.7601.17944 (win7sp1_gdr.120830-0333)x64ntoskrnl.exe+41861 C:\Windows\Minidump\112012-14289-01.dmp6157601293,096 111312-16723-01.dmp11/13/2012 6:46:11 AMKMODE_EXCEPTION_NOT_HANDLED0x0000001e00000000`0000000000000000`0000000000000000`0000000000000000`00000000nvlddmkm.sysnvlddmkm.sys+7ccad0 x64ntoskrnl.exe+7ef90 C:\Windows\Minidump\111312-16723-01.dmp6157601262,144 110912-15678-01.dmp11/9/2012 6:50:52 AMSYSTEM_THREAD_EXCEPTION_NOT_HANDLED0x1000007effffffff`c0000005fffff800`0304e861fffff880`009a9898fffff880`009a90f0ntoskrnl.exentoskrnl.exe+41861NT Kernel & SystemMicrosoft® Windows® Operating SystemMicrosoft Corporation6.1.7601.17944 (win7sp1_gdr.120830-0333)x64ntoskrnl.exe+41861 C:\Windows\Minidump\110912-15678-01.dmp6157601293,104 102512-19359-01.dmp10/25/2012 6:17:16 PMKMODE_EXCEPTION_NOT_HANDLED0x0000001e00000000`0000000000000000`0000000000000000`0000000000000000`00000000tcpip.systcpip.sys+5c7cc x64ntoskrnl.exe+7ef90 C:\Windows\Minidump\102512-19359-01.dmp6157601262,144 102512-16504-01.dmp10/25/2012 6:11:48 PMSYSTEM_THREAD_EXCEPTION_NOT_HANDLED0x1000007effffffff`c0000005fffff800`030a4861fffff880`009a9898fffff880`009a90f0ntoskrnl.exentoskrnl.exe+41861NT Kernel & SystemMicrosoft® Windows® Operating SystemMicrosoft Corporation6.1.7601.17944 (win7sp1_gdr.120830-0333)x64ntoskrnl.exe+41861 C:\Windows\Minidump\102512-16504-01.dmp6157601287,624 102112-22276-01.dmp10/21/2012 8:19:23 AMSYSTEM_SERVICE_EXCEPTION0x0000003b00000000`c0000005fffff800`02ee2d6cfffff880`084ccc0000000000`00000000Ntfs.sysNtfs.sys+e88b x64ntoskrnl.exe+7efc0 C:\Windows\Minidump\102112-22276-01.dmp6157601270,496 102112-19453-01.dmp10/21/2012 8:17:11 AMKMODE_EXCEPTION_NOT_HANDLED0x0000001e00000000`0000000000000000`0000000000000000`0000000000000000`00000000ataport.SYSataport.SYS+15594 x64ntoskrnl.exe+7ef90 C:\Windows\Minidump\102112-19453-01.dmp6157601287,584 102112-21153-01.dmp10/21/2012 8:12:43 AMKMODE_EXCEPTION_NOT_HANDLED0x0000001effffffff`c0000005fffff880`0444b89c00000000`00000000ffffffff`ffffffffdxgkrnl.sysdxgkrnl.sys+3289c x64ntoskrnl.exe+7efc0 C:\Windows\Minidump\102112-21153-01.dmp6157601288,928 102012-18018-01.dmp10/20/2012 12:13:29 PMSYSTEM_THREAD_EXCEPTION_NOT_HANDLED0x1000007effffffff`c0000005fffff880`03d35ef3fffff880`0368e978fffff880`0368e1d0dxgmms1.sysdxgmms1.sys+37e8e x64dxgmms1.sys+bef3 C:\Windows\Minidump\102012-18018-01.dmp6157601293,104 102012-15834-01.dmp10/20/2012 7:32:25 AMSYSTEM_SERVICE_EXCEPTION0x0000003b00000000`c0000005fffff880`040752a7fffff880`087a0db000000000`00000000Rt64win7.sysRt64win7.sys+1ba60 x64ntoskrnl.exe+7efc0 C:\Windows\Minidump\102012-15834-01.dmp6157601289,152

 

[Arc]

Post it following the Blue Screen of Death (BSOD) Posting Instructions .