Hello,
About two weeks ago I purchased Acer Aspire E5-575G-53VG. Everything worked well.
After I installed Anniversary Update, touchpad(ELANTECH) became unusable. It lags and movement is somewhat sluggish. When I switch touchpad setting in BIOS from ADVANCED to BASIC, no problem. But then gestures don't work. I've also found, that if CPU is on load, touchpad works normally. I think it's because of drivers. I made a clean install of Windows, installed all drivers from support page, updated windows and nothing helped(only BASIC mode, but then I lost functionality).
I've noticed that other people have this problem too. We should spread the word, so Acer finally updates drivers and/or BIOS.