uninstall drivers, Download https://static.tp-link.com/2017/201712/20171218/TL-WN881ND_EU_US_V2_170724_Wins.zip install & restart.
I have a Crosshair VIII, and this happens to me when I reformat my computer. WIFI drives work for like an hour then they just go away.... I have to go to ASUS and get the drivers and downgrade them and WIFI comes back after restart.