Norton 360 background tasks freeze up Windows 7

OK so I searched several ways...and nothing that seems to solve this.  I leave the PC alone for a little while...it goes "idle" and when I get back Norton 360 is performing background tasks, one of which appears to be to freeze my computer!  I was getting such weird behavior from my desktop I thought the harddrive was on its way to the grave...lots of hard reboots and accompanying issues.  Anyone getting help from Symantec??

 

Thanks...