I installed Antivirus plus 2016 recently and updated it to the latest build. I noticed whenever bitdefendet wanted to connect to update server and thus update services started, laptop's HDD usage jumped to 100%. It is specially troubling at start ups because it interferes with windows loading. I have decided to disable automatic update feature until I know whether there is a solution. Laptop is Asus zenbook UX303UB, core i7 6500, 8 Gb ram. Windows 10 latest build. I would appreciate any comment on the issue.