Heres what was in the log at the time of crash:
[10-04-2016 18:49:53] [FATAL] A fatal error has occurred: code 0xc0000005
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] 0x901840 SDL_MixAudio (??: 487)
[10-04-2016 18:49:53] [FATAL] ??: 487
[10-04-2016 18:49:53] [FATAL] 0x7772981f RtlInitializeExceptionChain (??: 487)
[10-04-2016 18:49:53] [FATAL] 0x7772981f RtlInitializeExceptionChain (??: 487)
[10-04-2016 18:49:53] [FATAL] Crash dump generated at C:\Users\Kevin_E\Documents\OpenXcom\10-04-2016_18-49-53.dmp
[10-04-2016 18:52:45] [FATAL] OpenXcom has crashed: code 0xc0000005
I have made some self made changes to the game but nothing heavy. Iv included 3 rul files that could be culprits. As you can see, nothing has been changed in these files.