Access violation - code c0000005 (!!! second chance !!!)
win32k!vSpRedrawArea+0x92:
8249170d ff7770          push    dword ptr [edi+70h]
kd> r
eax=ffffff0d ebx=fe9d6010 ecx=865c8d48 edx=00000001 esi=82a965ce edi=0000029a
eip=8249170d esp=8bda5560 ebp=8bda55e0 iopl=0         nv up ei ng nz ac po cy
cs=0008  ss=0010  ds=0023  es=0023  fs=0030  gs=0000             efl=00010293
win32k!vSpRedrawArea+0x92:
8249170d ff7770          push    dword ptr [edi+70h]  ds:0023:0000030a=????????