I'm running dMC release 13 with latest CODECs in 32 bit Vista Ultimate SP1. My PC has a Intel Core 2 Q6600 quad core CPU, yet when I convert a batch of files only one CPU is shown. I have converted FLAC to WAV, WAV to MP3, WAV to FLAC all with the same results. My system is definitely running in multi-core mode as task manager and device manager each show 4 CPUs.