The BSODs are seeming to be network related.
Code:
BugCheck D1, {fffff88103d61ae0, 2, 1, fffff88001a66872}
Probably caused by : tcpip.sys ( tcpip!TcpTcbHeaderSend+1f2 )
Followup: MachineOwner
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The Realtek 8185 Wireless device is disabled. So you are using the Realtek ethernet. There is a possibility of an update to this driver. Get the Win7 and Server 2008 R2 Auto Installation Program (second one of the list) from Realtek and install it.
Also, it is an old branded desktop PC. Some failure from the part of the display driver is also noticed there. The display driver is a part of the nForce chipset. Go to Drivers - Download NVIDIA Drivers and see if it offers any updates to your display driver.
Check if the Power Supply Unit (PSU) supplying adequate power to the computer or not.
eXtreme Power Supply Calculator
Also let us know the wattage of the PSU that you have.
Is the computer hot? Report us the heat of the computer after a couple of hours of your normal usage. Upload a screenshot of the summery tab of Speccy. Alternatively, you can publish a Speccy snapshot too: Speccy - Publish Snapshot of your System Specs .
Finally, as there is multiple elements are being blamed in every single crash dumps, test your RAM modules for possible errors.
Run memtest86+ for at least 8 consecutive passes.
If it start showing errors/red lines, stop testing. A single error is enough to determine that something is going bad there.
Let us know the results.
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Code:
BugCheck D1, {fffff88103d61ae0, 2, 1, fffff88001a66872}
Probably caused by : tcpip.sys ( tcpip!TcpTcbHeaderSend+1f2 )
Followup: MachineOwner
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Code:
fffff800`00b9ba20 fffff880`01a876f4 tcpip!TcpTcbHeaderSend+0x1f2
fffff800`00b9bbd0 fffff880`01a62745 tcpip!TcpFlushDelay+0x204
fffff800`00b9bcb0 fffff880`01a5af37 tcpip!TcpPreValidatedReceive+0x3e5
fffff800`00b9bd80 fffff880`01a5aaaa tcpip!IppDeliverListToProtocol+0x97
fffff800`00b9be40 fffff880`01a5a0a9 tcpip!IppProcessDeliverList+0x5a
fffff800`00b9bee0 fffff880`01a57d4f tcpip!IppReceiveHeaderBatch+0x23a
fffff800`00b9bfc0 fffff880`01a57322 tcpip!IpFlcReceivePackets+0x64f
fffff800`00b9c1c0 fffff880`01a5674a tcpip!FlpReceiveNonPreValidatedNetBufferListChain+0x2b2
fffff800`00b9c2a0 fffff800`034dd878 tcpip!FlReceiveNetBufferListChainCalloutRoutine+0xda
fffff800`00b9c2f0 fffff880`01a56e42 nt!KeExpandKernelStackAndCalloutEx+0xd8
fffff800`00b9c3d0 fffff880`0177c0eb tcpip!FlReceiveNetBufferListChain+0xb2
fffff800`00b9c440 fffff880`01745ad6 ndis!ndisMIndicateNetBufferListsToOpen+0xdb
fffff800`00b9c4b0 00000000`00000000 ndis!ndisMDispatchReceiveNetBufferLists+0x1d6
Code:
fffff800`00b9bde8 fffff880`0f29dc85Unable to load image \SystemRoot\system32\DRIVERS\nvlddmkm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
nvlddmkm+0x46c85
Code:
Image name: nvlddmkm.sys
Timestamp: Thu Jan 31 13:15:04 2013