Varying BSOD playing Skyrim

[msg45f]

Recently purchased Lenovo W540 workstation. Tested it after arrival for a couple days, didn't experience any problems. After reinstalling Windows 7 I've been experiencing varying BSOD. They have occurred while playing Skyrim, though this is the only GPU intensive task I've done on the machine.

 

[Golden]

fffff880`0a3e31c0  00000000`00000000
fffff880`0a3e31c8  fffffa80`07fcd230
fffff880`0a3e31d0  fffff880`0f39d840*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for [B][COLOR="Red"]nvlddmkm.sys[/COLOR][/B]
 nvlddmkm+0xd0840
fffff880`0a3e31d8  fffff880`0f39d8c6 nvlddmkm+0xd08c6
fffff880`0a3e31e0  fffffa80`0cb90888

Uninstall the NVidia driver completely, then reinstall following the suggestions here:

http://www.sevenforums.com/tutorials/327414-nvidia-drivers-avoid-problems.html

Monitor and advise us the situation.

 

[msg45f]

Uninstalled the driver as per the linked instructions.
Oddly, upon rebooting windows attempted to reinstall the drivers automatically. I couldn't run the Nvidia driver installation while was happening, so I just had to wait for it to finish installing drivers. Otherwise did the same. Nvidia WMI was also listed in the Nvidia installation not shown in the example image (probably due to being a Quadro) which I installed.

Tested for a bit and eventually experienced another BSOD.

Uninstalled again and installed using the installer from Lenovo's website. Tested for a bit, and it eventually became unstable (audio/video locking up momentarily). previously this was almost always immediately followed by a BSOD, but instead happened intermittently for about a minute and then Skyrim.exe crashed. System was stable afterwords. Will see if this repeats after work.

Attached is an updated debug dump.

 

[msg45f]

I hadn't had any BSOD for a couple weeks, so I thought this was likely solved given the previous advice, but today I have had two BSOD, one while playing and a second with just Chrome and a few tabs open (this has not happened before, so it's possible that it's a completely different issue, but I don't know).

Attached is the dump file.

Not sure if relevant, but the first time I ran the DM log collector utility, it returned an empty .zip file.

 

[Golden]

fffff880`0b4d66c8  00000000`00000000
fffff880`0b4d66d0  fffff880`0b4d6700
fffff880`0b4d66d8  fffff880`05e7ab79Unable to load image \SystemRoot\system32\DRIVERS\Netwsw02.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for[B][COLOR="Red"] Netwsw02.sys[/COLOR][/B]
*** ERROR: Module load completed but symbols could not be loaded for Netwsw02.sys
 Netwsw02+0x14b79
fffff880`0b4d66e0  fffffa80`13361d50
fffff880`0b4d66e8  00000000`0000000a

Product Type	Intel(R) Wireless-N 7260

Please check if an updated driver exists for the above wireless adapter here:
https://downloadcenter.intel.com/

 

[msg45f]

fffff880`0b4d66c8  00000000`00000000
fffff880`0b4d66d0  fffff880`0b4d6700
fffff880`0b4d66d8  fffff880`05e7ab79Unable to load image \SystemRoot\system32\DRIVERS\Netwsw02.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for[B][COLOR="Red"] Netwsw02.sys[/COLOR][/B]
*** ERROR: Module load completed but symbols could not be loaded for Netwsw02.sys
 Netwsw02+0x14b79
fffff880`0b4d66e0  fffffa80`13361d50
fffff880`0b4d66e8  00000000`0000000a

Product Type	Intel(R) Wireless-N 7260

Please check if an updated driver exists for the above wireless adapter here:
https://downloadcenter.intel.com/

When running the automated updater tool, it had initially failed to download the driver for the network card. As such, I manually installed a newer driver, but still ran into BSOD. Tried the automated tool again and the download worked, so I replaced the driver using the tool, with another BSOD happening today.

The log is attached.