Just bought a Lenovo computer 4g Ram, core 3i, Windows 7 Professional for my Djing. Bought Virtual DJ pro ($99), I've used it at only 3 gigs and had problems twice. I've been using the 4 CD deck screen, the first time I had a song start to sutter, couldn't stop it and I had to reboot the system. Yesterday I was using automix and dragged a song to another deck to listen to it on my headphones. As soon as I dragged it the sound cut out of my speakers. The songs were still playing on the computer but the sound was lost. Luckily I had my previous computer with DJ Power there and used that for the rest of the night. Any thoughts???