BSOD ntoskrnl.exe+e417a (win7sp1_gdr.110622-1506)

Most of your dumps are blaming netr28x.sys which is a driver relating to your Ralink RT2860 wireless lan card which is approx 12months old, check for an update for this driver

Additional information is required.

1. Download the DM Log Collector application to your desktop by clicking the link below

DM Log Collector.exe

2. Run it by double-clicking the icon on your desktop, and follow the prompts.
3. Locate the .ZIP file that is created on your desktop, and upload it here in your next reply.

Code:

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck A, {fffff8a000a53c70, 2, 1, fffff8000335a679}

*** WARNING: Unable to verify timestamp for netr28x.sys
*** ERROR: Module load completed but symbols could not be loaded for netr28x.sys
Probably caused by : netr28x.sys ( netr28x+4b98d )

Followup: MachineOwner
---------

0: kd> lmvm netr28x
start             end                 module name
fffff880`076ab000 fffff880`07915000   netr28x  T (no symbols)           
    Loaded symbol image file: netr28x.sys
    Image path: \SystemRoot\system32\DRIVERS\netr28x.sys
    Image name: netr28x.sys
    Timestamp:        Mon Apr 20 19:52:50 2015 (5534D37A)
    CheckSum:         0026BF4B
    ImageSize:        0026A000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

This BSOD still appears to be related to the RaLink driver. Is this driver the most recent available? please check that.