Scratchy/Laggy Issues

Hey Ya'll,
I'm currently trying to run Cross DJ 2.6 on Win8 with 8 gigs of ram and an intel i7. Using a Mixtrack Pro for controller. Music will run smoothly for awhile, but it usually starts to get laggy/scratchy when I load a new track to the other deck or start playing another track or really any sort of multi tasking. Does anyone have any possibilities to try troubleshooting this? I don't even know if it's my computer, controller, or what exactly. Any suggestions would be great. This is so frustrating.
Thanks
I'm currently trying to run Cross DJ 2.6 on Win8 with 8 gigs of ram and an intel i7. Using a Mixtrack Pro for controller. Music will run smoothly for awhile, but it usually starts to get laggy/scratchy when I load a new track to the other deck or start playing another track or really any sort of multi tasking. Does anyone have any possibilities to try troubleshooting this? I don't even know if it's my computer, controller, or what exactly. Any suggestions would be great. This is so frustrating.
Thanks