I am running Windows 10.
A few weeks ago, for some reason my GW2 desktop icon became a blank piece of paper rather than the GW2 logo. A few days ago I finally got around to trying to fix it. I deleted the icon and went to the folder with GW2 and hit create desktop shortcut on the .exe file. When I went to start GW2 it decided it needed to redownload the whole game. Ok, that's stupid but whatever. Redownload the whole game I guess. Play for hours, 0 problems. The issue is, today I log in and it says it needs to redownload the whole game AGAIN. No idea what to do or why this is happening.