Driver_irql_not_less_or_equal

Hi,
Your single dmp point to Rt64win7.sys as the cause, so I suggest you to reinstall your NIC driver.
Realtek

Beside that, your bugcheck is DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) = most likely caused by 3rd drivers.
I suspecting your 3rd antivirus/firewall which causing the problem, it seem they interference with Windows driver (ndis.sys and tcpip.sys).

So I would recommend you to uninstall PC Tools , ThreatFire and Symantec Antivirus software.
Replace it with MSE and activated Windows built-in firewall.
Then we'll see if the BSOD goes away.
http://www.microsoft.com/security_essentials/

Code:

Child-SP          RetAddr           Call Site
fffff880`09110428 fffff800`02a75ca9 nt!KeBugCheckEx
fffff880`09110430 fffff800`02a74920 nt!KiBugCheckDispatch+0x69
fffff880`09110570 fffff880`0187a3ba nt!KiPageFault+0x260
fffff880`09110700 fffff880`01878bc9 tcpip!TcpBeginTcbSend+0x32a
fffff880`09110980 fffff880`01874a56 tcpip!TcpTcbSend+0x1d9
fffff880`09110c00 fffff880`0187c44c tcpip!TcpFlushDelay+0x316
fffff880`09110ce0 fffff880`0185e6c7 tcpip!TcpPreValidatedReceive+0x20c
fffff880`09110d90 fffff880`0185e799 tcpip!IppDeliverListToProtocol+0x97
fffff880`09110e50 fffff880`0185ec90 tcpip!IppProcessDeliverList+0x59
fffff880`09110ec0 fffff880`0185db21 tcpip!IppReceiveHeaderBatch+0x231
fffff880`09110fa0 fffff880`0185c592 tcpip!IpFlcReceivePackets+0x651
fffff880`091111a0 fffff880`01875e5a tcpip!FlpReceiveNonPreValidatedNetBufferListChain+0x2b2
fffff880`09111280 fffff800`02a85e5a tcpip!FlReceiveNetBufferListChainCalloutRoutine+0xda
fffff880`091112d0 fffff880`01875882 nt!KeExpandKernelStackAndCalloutEx+0xda
fffff880`091113b0 fffff880`0171b0eb tcpip!FlReceiveNetBufferListChain+0xb2
fffff880`09111420 fffff880`016e4fc6 ndis!ndisMIndicateNetBufferListsToOpen+0xdb
fffff880`09111490 fffff880`0165eef1 ndis!ndisMDispatchReceiveNetBufferLists+0x1d6
fffff880`09111910 fffff880`045b9f66 ndis!NdisMIndicateReceiveNetBufferLists+0xc1
fffff880`09111960 fffffa80`0618a000 Rt64win7+0x15f66
fffff880`09111968 00000000`00000001 0xfffffa80`0618a000