Bsod driver_power_failure

Recent updates that require a reboot take 10+ minutes to shut down, then a message recovered from unexpected error and system more or less normal.

ACPIx64 (Samsung R480 with new solid state HD ~2 years ago).

BSOD problem started about a week ago when installed Cisco AnyConnect Secure Mobility Client (for remote work related use). System shutting down seemed to be perpetual state (more than 10 minutes).

I created a 2nd user account (with admin privs), uninstalled and reinstalled the Cisco app. Still had BSOD, typically choosing to restart in normal (always same BSOD--see Problem Sig and BCP output below-- only BCP3 and BCP4 change with each occurence).

A few days later, the Cisco needed to update and had update issues. Again, I uninstalled and reinstalled this app -- after downgrading the 2nd user account to User privs.

What I see as a problem (ongoing since forever. 3 or 4 years) is Network Adapters. My network (internet) is wireless, supplied through my SmartPhone, which looks like any of the available networks for (wireless) internet access. If I go out of range with my phone (walk into the yard) when my laptop is connected and on, reconnecting is problematic--sometimes the internet icon has a yellow star, sometimes a red X, and sometimes clicking the icon opens the Wireless Network Connection dialog box, sometimes not. If I use Control Panel Network and Internet > Network and Sharing Center, it may say that I have no networks available. Until I restart.

Device Manager lists 4 Network Adapters:

• Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64
• Marvell Yukon 88E8040 Family PCI-E Fast Ethernet Controller
• Microsoft Virtual Wifi Miniport Adapter
• Qualcomm Atheros AR9285 Wireless Network Adapter

Control Panel > Network and Internet > Network and Sharing Center
Lists 1 computer and 2 Media Devices (my two user accounts) (is that typical?)
https://drive.google.com/file/d/0B0p...ew?usp=sharing (looks like image doesn't find this PNG file.

Code:

fffff880`03bbc178  fffffa80`07b461a0
fffff880`03bbc180  fffffa80`07b46100
fffff880`03bbc188  fffff880`06f00bb5Unable to load image \SystemRoot\system32\DRIVERS\athrx.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for athrx.sys
*** ERROR: Module load completed but symbols could not be loaded for athrx.sys
 athrx+0x8bb5
fffff880`03bbc190  00000000`00000000
fffff880`03bbc198  00000000`00000000
.
fffff880`06ef8000 fffff880`072fe000   athrx    T (no symbols)           
    Loaded symbol image file: athrx.sys
    Image path: \SystemRoot\system32\DRIVERS\athrx.sys
    Image name: athrx.sys
    Timestamp:        Tue Sep 24 17:12:49 2013 (52414279)
    CheckSum:         003DEE20
    ImageSize:        00406000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

The outdated Atheros driver is the cause of the problem - update it here:
https://www.atheros-drivers.com/