DEP exception in tkchat.exe

0:000> g
ModLoad: 74820000 7483e000   C:\Windows\system32\ShimEng.dll
ModLoad: 75ef0000 75f1c000   C:\Windows\system32\apphelp.dll
ModLoad: 77a60000 77a69000   C:\Windows\system32\LPK.DLL
ModLoad: 779e0000 77a5d000   C:\Windows\system32\USP10.dll
ModLoad: 74e00000 74e3f000   C:\Windows\system32\uxtheme.dll
ModLoad: 10780000 10832000   C:\Users\pat\AppData\Local\Temp\TCL161F.tmp
ModLoad: 760f0000 7611d000   C:\Windows\system32\WS2_32.dll
ModLoad: 76350000 76356000   C:\Windows\system32\NSI.dll
(9c4.bd4): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=00000010 ebx=021a5f64 ecx=00000000 edx=00000000 esi=021a5f48 edi=80000000
eip=10826e42 esp=0012ece8 ebp=10807583 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010246
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Users\pat\AppData\Local\Temp\TCL161F.tmp - 
TCL161F!Tls_NewX509Obj+0xa2832:
10826e42 8b4c240c        mov     ecx,dword ptr [esp+0Ch] ss:0023:0012ecf4=00000001
0:000> kd
0012ece4  003b0000
0012ece8  107c434c TCL161F!Tls_NewX509Obj+0x3fd3c
0012ecec  021a5f48
0012ecf0  021a5f64
0012ecf4  00000001
0012ecf8  fffffc11
0012ecfc  0012ed74
0012ed00  00000000
0012ed04  0012ede4
0012ed08  107aa922 TCL161F!Tls_NewX509Obj+0x26312
0012ed0c  0012ed84
0012ed10  021a5f48
0012ed14  107ae841 TCL161F!Tls_NewX509Obj+0x2a231
0012ed18  0012ed74
0012ed1c  0012ed84
0012ed20  fffffc11
0012ed24  00000010
0012ed28  0012ede4
0012ed2c  107b22c5 TCL161F!Tls_NewX509Obj+0x2dcb5
0012ed30  0012ed74