Multiple running errors

ok since my return I have had several issues with running the game...

The most common one, is every time i start up the game, it goes full screen and I have to resize it, even skip the opening cinematic every time.

The 2nd one, I play the game, only for the next day, my client simply doesn't let me log in. I have to re-download the client, and all of my Addons over again. It's honestly becoming very aggravating and annoying spending my first hr online setting everything all back up.

follow these steps:
1) Restart your PC ( this is important)
2) close your Torrent client and move your WoW folder away from your Torrent's download destination
3) now right click on WoW folder> Properties> remove "read-only"

thank you very much, that seems to have fixed the issue.