random BSODs last 2 days, KERNEL_SECURITY_CHECK_FAILURE

Today's crashes are blaming Atheros Extensible Wireless LAN device driver.

Code:

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*                                                                             *
*                        Bugcheck Analysis                                    *
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Use !analyze -v to get detailed debugging information.

BugCheck 139, {3, fffff88002f88260, fffff88002f881b8, 0}

*** WARNING: Unable to verify timestamp for ts_arnusbx.sys
*** ERROR: Module load completed but symbols could not be loaded for ts_arnusbx.sys
Probably caused by : ts_arnusbx.sys ( ts_arnusbx+5490 )

Followup: MachineOwner
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But the driver is not any old.

Code:

fffff880`0825a000 fffff880`08443000   ts_arnusbx T (no symbols)           
    Loaded symbol image file: ts_arnusbx.sys
    Image path: ts_arnusbx.sys
    Image name: ts_arnusbx.sys
    Timestamp:        Mon Jul 22 22:40:23 2013 (51ED677F)
    CheckSum:         001ECEF7
    ImageSize:        001E9000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

So we need to search the reason behing the crashes somewhere else. Post it following the Blue Screen of Death (BSOD) Posting Instructions.

Also Scan the system for possible virus infection with the following programs.

• Anti-rootkit utility TDSSKiller
• Windows Defender Offline