Pioneer DDJ1000SRT Issue

Hi,

Having a issue with the controller, whilst trying to beat match the tracks on both decks drift somewhat, i can match the beat get so its solid but then constant adjustment is required. Has anyone experienced this issues. i have owned and previously used other pioneer cdjs etc in the past but not experienced this. 

I am using a lenovo windows 10 laptop  i5 processor 8GB ram. Could the laptop be an issues, tried lots of different things but something seems a miss.

Any advice would be appreciated.

Thanks