.text:0083923C E8 B7 F2 BC FF                    call    CreateMutex
.text:00839241 A3 AC C3 86 00                    mov     ds:dword_86C3AC, eax
.text:00839246 83 3D AC C3 86 00+                cmp     ds:dword_86C3AC, 0
.text:0083924D 74 79                             jz      short loc_8392C8
.text:0083924F E8 EC F3 BC FF                    call    GetLastError_0
.text:00839254 85 C0                             test    eax, eax
.text:00839256 75 70                             jnz     short loc_8392C8
.text:00839258 8B 0D 88 56 86 00                 mov     ecx, off_865688