That pause will stop your installation sequence. U may use PING 1.1.1.1 -n 1 -w 500 >NUL System will try yo ping 1.1.1.1 for 0,5sec. Then next command can kill aimp. But i use another solution. I have created a reg file, contains all file types which i want to associate with my program. U may use only 1 or 2 filetype commonly used. Just install reg file and continue during setup. After all done aimp will able to open that ommonly used file types. After first run, aimp can create entire filetype association list in registry, by himself.