I am not saying it is the answer, but I had this happen a few times, so had AJ upgrade to AJAMSONIC and put in a digital drive(SSD?). This, not only stopped the freezing(occasional), but gave me way more great sounds and styles.

Just a thought. Call AJ
_________________________
pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact