Game crashes and settings wont save

So I just finished downloading the game, I opened it and got into the game, it crashed three times when i killed the tutorial mobs and when i pressed exit the game it crashed once too.
Also, everytime I change my effects to ultra and restart the game, it starts it all over, dosent save the settings and it shows the loading screen like its the first time im playing wow, its showing the blizzard logo and then that agreement that i gotta check accept the first time I log in, and im frustrated.

Wotlk client?

I recommend you to delete your Woltk client and get a new one here: https://www.warmane.com/download by selecting "Wotlk (old)"

Then, to solve the "Settings won't save" problem you need to follow these steps:
1) Restart your PC
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".