deformation of sound and cpu has its max

Hello I use the trial version currently rekordbox DJ v4 with DDJSX2 and after a while to load a song that plays the songs began to seriously distort and mounts cpu has its very embarrassing for maximum c an evening that sort of thing
is there a remedy for this problem? I'm on a PC I7 with 8GB of ram and mix with other software acun worries at this level