Hardisk Activities 100% windows 10 after Bitdefender 2017

i have 3 devices 2 have install bitdefender total security 2017, and one pc are using ssd another pc are using hardisk, both have their hardisk activities at 90% to 100% constantly on desktop idle with no program running, on resource manager u can see bitdefender keep running the hardisk making it running at 95 to 100% causing both my pc to lag and hang.. and my pc has new i5 , + 16gb rams... previous bitdefender 2016 doesnt have this issue, i try everything disable superfetch, searchui etc, i have confirm its not windows 10 problem but bitdefender 2017, after i totally uninstall it, my pc is back to normal and speed up tremendously .. im using kaspersky total security ever since.. its way way much better.. u guys be warn!!!