Hmmm @Shideravan, strange problem u have !. Me too used win8.1.upd1.x64 and no problem with compiling.

See fragment from my bat: if maybe help u something:
Code:
:QMC2-MAME

echo -------------------------------
set start_time=%time%
echo Begining at: %start_time%
echo Runing compiling..
echo.
start timer
set MINGW_HOME=g:\compile_mame\mingw64-w64\bin\
set QT_PLUGIN_PATH=g:\compile_mame\mingw64-w64\Qt\plugins\
set QT_BIN_PATH=g:\compile_mame\mingw64-w64\Qt\Bin\
set Tortoise_SVN_BIN=%programfiles%\TortoiseSVN\bin\
set x86_64-w64-mingw32=g:\compile_mame\mingw64-w64\x86_64-w64-mingw32\bin\
set TEMP=g:\compile_mame\temp\
set TMP=g:\compile_mame\temp\
set PATH=%MINGW_HOME%;%QT_PLUGIN_PATH%;%QT_BIN_PATH%;%Tortoise_SVN_BIN%;%x86_64-w64-mingw32%;%TEMP%;%TMP%
set PROMPT=MameEnv-%PROMPT%
echo MAME Enviroment Ready!                           
echo To Build MAME type:                           
echo make
make clean MINGW=1
make EMULATOR=mame WIP=1 MINGW=1 -j5
set end_time=%time%
echo Finish at: %end_time%
echo --------------------------------
echo Start at: %start_time%
echo Finish at: %end_time%
echo --------------------------------
timer /s /nologo 
GOTO MENU

Now download qmc2-0.43.tar.bz2 and test with winrar5.01 x64, 7zip 9.32 x64 + Total Commander and internal zip plugins - no problem with decompress.

Last edited by oddi; 04/25/14 07:36 PM.