Various BSOD During Various Activities - Increasing Frequency

Code:

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

BugCheck A, {0, 2, 1, fffff80002cde142}

*** WARNING: Unable to verify timestamp for netr28ux.sys
*** ERROR: Module load completed but symbols could not be loaded for netr28ux.sys
Probably caused by : nwifi.sys ( nwifi!ExtSTAReceivePacket+9ac )

Followup: MachineOwner
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start             end                 module name
fffff880`05877000 fffff880`05ac1000   netr28ux T (no symbols)           
    Loaded symbol image file: netr28ux.sys
    Image path: \SystemRoot\system32\DRIVERS\netr28ux.sys
    Image name: netr28ux.sys
    Timestamp:        Fri Jan 24 21:09:21 2014 (52E242D9)
    CheckSum:         0024F054
    ImageSize:        0024A000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Code:

Name	[00000011] 802.11n USB Wireless LAN Card
Adapter Type	Ethernet 802.3
Product Type	802.11n USB Wireless LAN Card
Installed	Yes
PNP Device ID	USB\VID_148F&PID_5372\5&3A35E5FC&0&1

What make of USB wireless card are you using? Ralink? Please check for and install any updates located here:
Downloads - MediaTek

There is a slim possibility either the card or USB port may be physically damaged:

Code:

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

BugCheck 1000007E, {ffffffffc000001d, fffff800020cf066, fffff88001fb28a8, fffff88001fb2100}

Probably caused by : hardware ( nt!ExAcquireResourceSharedLite+56 )

Followup: MachineOwner
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Try an updated driver first and see if the BSOD's stop.

OK. Try updating the driver - then we take it from there.