Not sure why but after uninstalling my ethernet speed went back to the usual. If anyone knows how to adjust something in avast premium security to stop it from reducing the ethernet speed by 100 mbps please share, thanks. tutuapp Vidmate
wish i had 100mbps to lose 
using premium here with no loss what so ever.
are you using a vpn and if so is it avast.
i tried it before buying and it dropped my speed by around 30mbps so went for nord vpn which doesnt drop at all.
sadly im with BT and only have 65-70 down and 17 up speeds for me.