The driver that appears to be the problem is the mfewfpk.sys:
kd> !analyze -v
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************
WORKER_THREAD_RETURNED_AT_BAD_IRQL (e1)
Arguments:
Arg1: 83833535, address of worker routine (do ln on this to find guilty driver)
Arg2: 00000002, IRQL returned at (should have been 0, but isn't).
Arg3: 862d7198, workitem parameter
Arg4: 862d7198, workitem address
kd> dps 862d7198
862d7198 00000000
862d719c 890ef008
862d71a0 83833535 nt!IopProcessWorkItem
862d71a4 862d7198
862d71a8 8adaacc0Unable to load image \SystemRoot\system32\drivers\mfewfpk.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for mfewfpk.sys
*** ERROR: Module load completed but symbols could not be loaded for mfewfpk.sys
mfewfpk+0xbcc0
The mfewfpk.sys is a McAfee firewall driver and the problem you are experiencing is similar to that reported in the following thread:
http://answers.microsoft.com/en-us/...ort-says/f03e8ad6-35ac-4b53-8223-bc4bc1200a10
As in that thread there also appears to be Microsoft Security Essentials installed on your system so I would suggest to uninstall McAfee and Microsoft Security Essentials and then install a fresh copy of either Microsoft Security Essentials or McAfee but not both.
Also since McAfee and/or Microsoft Security Essentials may not have been working properly consider running a scan with the following two applications just to see if they pick anything up:
TDSSKiller:
http://support.kaspersky.com/faq/?qid=208283363
Malwarebytes Antimalware (free version) - do a "Quick Scan":
http://www.malwarebytes.org/products/malwarebytes_free