Well to clear up if your having a software issue or hardware issue, why don't you try a Clean install
Guide hereYour BIOS should be 210 or above
Install the ASUS ATK Package drivers
Install the latest Chipset drivers
Install the latest IRST Drivers
Install the latest Atheros Wlan Drivers
Install the latest Atheros Lan Drivers
Install your AV IS program
Let Windows update run
Test your internet connection before installing any other software, if your still lagging block your AV IS programs.
Test your internet connection again. If your still lagging you either have a Network problems or defective hard ware. Test your wireless on another network at a friends location or business?
Test your Internet connection using your LAN hard wired.
G752VY-DH72 Win 10 Pro
512 GB M.2 Samsung 960 Pro
1 TB Samsung 850 pro 2.5 format
980m GTX 4 GB
32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K
Windows 10 Pro
Z97 -A
Windows 10 Pro