Coresync.exe is nuts! Could not figure out why my PC was running slow and our internet connection was so slow. Looks like its bloody Coresync.exe and when you 'End task' it fixes it for a moment then it fires back up again, insane! But I found if you just suspend the process instead of ending it then you can get back to gaming and uploading funny cats videos. Instantly went from a 12hr upload time to 15mins.
Is there a better solution? Seriously starting to wonder if I need adobe anymore, its more trouble than its worth.