Windows 7 BSOD during windows update / System Boot up

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Use !analyze -v to get detailed debugging information.

BugCheck 50, {fffff8a00307d000, 0, fffff880047822d7, 0}

Unable to load image \SystemRoot\system32\DRIVERS\atikmpag.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for atikmpag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmpag.sys

Could not read faulting driver name
Probably caused by : atikmpag.sys ( atikmpag+292d7 )

Followup: MachineOwner
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0: kd> !analyze -v
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PAGE_FAULT_IN_NONPAGED_AREA (50)
Invalid system memory was referenced.  This cannot be protected by try-except,
it must be protected by a Probe.  Typically the address is just plain bad or it
is pointing at freed memory.
Arguments:
Arg1: fffff8a00307d000, memory referenced.
Arg2: 0000000000000000, value 0 = read operation, 1 = write operation.
Arg3: fffff880047822d7, If non-zero, the instruction address which referenced the bad memory
    address.
Arg4: 0000000000000000, (reserved)

Debugging Details: