Question / Help OBS random crashes

[darth_maul_x3]

Hi everyone!
After reinstalling Windows 7 on a streaming PC, i've got some troubles with OBS. Sometime stream crashes within an hour, or hour and a half, two hours, and sometimes it can go for an hours with no problems.
I've tried replacing directX dlls, reinstalling vga drivers - i've had a couple days with no problem, but then it started crushing again.

Spoiler

OBS has encountered an unhandled exception and has terminated. If you are able to
reproduce this crash, please submit this crash report on the forums at
http://www.obsproject.com/ - include the contents of this crash log and the
minidump .dmp file (if available) as well as your regular OBS log files and
a description of what you were doing at the time of the crash.

This crash appears to have occured in the 'c:\windows\system32\d3d11.dll' module.

**** UNHANDLED EXCEPTION: c0000005
Fault address: 000007FEF8D48B8C (c:\windows\system32\d3d11.dll)
OBS version: Open Broadcaster Software v0.651b
Windows version: 6.1 (Build 7601) Service Pack 1
CPU: Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz

Crashing thread stack trace:
Stack EIP Arg0 Arg1 Arg2 Arg3 Address
0000000002DBE760 000007FEF8D48B8C 000000001ED507D0 000000000034FE80 00000000003302B8 000000007734FBA8 d3d11.dll!0x7fef8d48b8c
0000000002DBE790 000007FEF8D21221 0000000000000000 0000000032F10388 000000001D53CCD0 000000001D53CCE0 d3d11.dll!0x7fef8d21221
0000000002DBE7C0 000007FEF8D518F9 0000000002DBEAA0 000007FEF6C39896 0000000000000000 0000000000000200 d3d11.dll!0x7fef8d518f9
0000000002DBE9A0 000007FEF6C39736 000000001EE65400 0000000000000001 0000000000000000 000007FEF6C77712 nvwgf2umx.dll!0x7fef6c39736
0000000002DBECE0 000007FEF6C9D34A 000000001EE6A540 0000000002DBEE30 0000000000000000 0000000000000001 nvwgf2umx.dll!0x7fef6c9d34a
0000000002DBED30 000007FEF6C43A7B 0000000000000001 0000000032E13350 0000000000000000 0000000C00000000 nvwgf2umx.dll!0x7fef6c43a7b
0000000002DBEFC0 000007FEF6C3F309 0000000002DBF448 0000000032BFC680 0000000000000000 0000000002DBF120 nvwgf2umx.dll!0x7fef6c3f309
0000000002DBF020 000007FEF6C3F659 0000000032DCE901 0000000032CA8F60 0000000032DD6110 0000000000000000 nvwgf2umx.dll!0x7fef6c3f659
0000000002DBF1C0 000007FEF6F1983C 000000000074B488 0000000002DBF310 0000000032CA9068 000007FEF6C7780B nvwgf2umx.dll!0x7fef6f1983c
0000000002DBF210 000007FEF6E77DCC 0000000000000000 0000000000000000 000007FEF710E470 000000001EE137E8 nvwgf2umx.dll!0x7fef6e77dcc
0000000002DBF780 000007FEF6E77588 000000001ED5A448 0000000000000000 000000001EE16B80 0000000000000000 nvwgf2umx.dll!0x7fef6e77588
0000000002DBF7B0 000007FEF6594C9E 0000000032BA2280 0000000000000000 000000001EE16B80 000000001EE12DF0 nvwgf2umx.dll!0x7fef6594c9e
0000000002DBF7E0 000007FEF66472FD 0000000032BA2398 0000000000000000 0000000032E71320 0000000000000000 nvwgf2umx.dll!0x7fef66472fd
0000000002DBF820 000007FEF663F52D 0000000000000000 0000000000000000 0000000000000000 0000000000000000 nvwgf2umx.dll!0x7fef663f52d
0000000002DBF850 000007FEF6C9C89A 0000000032E71320 0000000000000000 0000000000000000 0000000000000000 nvwgf2umx.dll!0x7fef6c9c89a
0000000002DBF880 000007FEF7041BE7 000007FEF721B730 0000000000000000 0000000000000000 0000000000000000 nvwgf2umx.dll!0x7fef7041be7
0000000002DBF8B0 000007FEF7041D8E 0000000000000000 0000000000000000 0000000000000000 0000000000000000 nvwgf2umx.dll!0x7fef7041d8e
0000000002DBF8E0 00000000770F59CD 0000000000000000 0000000000000000 0000000000000000 0000000000000000 kernel32.dll!0x770f59cd
0000000002DBF910 000000007732B891 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ntdll.dll!0x7732b891