Connected to Windows 7 7601 x86 compatible target at (Wed Apr 22 13:22:07.724 2015 (UTC + 2:00)), ptr64 FALSE
Kernel Debugger connection established.
Symbol search path is: srv*c:\symbols*http://msdl.microsoft.com/download/symbols;srv*c:\symbols*http://chromium-browser-symsrv.commondatastorage.googleapis.comSRV*c:\symbols\*http://symbols.mozilla.org/firefox;srv*c:\symbols*https://chromium-browser-symsrv.commondatastorage.googleapis.com
Executable search path is: 
Windows 7 Kernel Version 7601 MP (1 procs) Free x86 compatible
Built by: 7601.18798.x86fre.win7sp1_gdr.150316-1654
Machine Name:
Kernel base = 0x82a1c000 PsLoadedModuleList = 0x82b665b0
System Uptime: not available
nt!DbgLoadImageSymbols+0x47:
82a34584 cc              int     3
kd> g
nt!DbgLoadImageSymbols+0x47:
82a34584 cc              int     3
kd> g
Access violation - code c0000005 (!!! second chance !!!)
win32k!ThreadUnlock1+0x35:
8263c3cc 8a5109          mov     dl,byte ptr [ecx+9]
kd> r
eax=ffa95168 ebx=825bedd6 ecx=ff9750e0 edx=9b658934 esi=00000001 edi=000401ad
eip=8263c3cc esp=9b6a4c10 ebp=9b6a4c24 iopl=0         nv up ei ng nz na po nc
cs=0008  ss=0010  ds=0023  es=0023  fs=0030  gs=0000             efl=00010282
win32k!ThreadUnlock1+0x35:
8263c3cc 8a5109          mov     dl,byte ptr [ecx+9]        ds:0023:ff9750e9=??
kd> kp 16
ChildEBP RetAddr  
9b6a4c0c 825bee22 win32k!ThreadUnlock1+0x35
9b6a4c24 82a598a6 win32k!NtUserEndDeferWindowPosEx+0x4c
9b6a4c24 77807074 nt!KiSystemServicePostCall
0244f71c 7743a69e ntdll!KiFastSystemCallRet
WARNING: Frame IP not in any known module. Following frames may be wrong.
0244f730 013d1401 0x7743a69e
0244f740 7744c4e7 0x13d1401
0244f868 77806fae 0x7744c4e7
0244f918 778065d4 ntdll!KiUserCallbackDispatcher+0x2e
0244f91c 777f230d ntdll!NtSetEvent+0xc
0244f930 777f2346 ntdll!RtlpUnWaitCriticalSection+0x36
0244f948 00000000 ntdll!RtlLeaveCriticalSection+0x51