game issue + can't download wotlk (old)

Hi, I have been playing lately in lordaeron without issues.
Sometimes when i open the game my screen goes grey with flickering dots (like old tvs). yesterday for some reason it started to do it EVERYTIME i opened the game. And only this game. I open TBC, the sims 4, etc and no problem. i erased my cache and am now able to enter the game but now it randomly does the grey screen thing when i am in game (and there is no fix, i have to shut down the laptop and restart).
I do not know how to fix that or why it happens could not find anything about that on google.

So if someone knows something it would be great. (I have a crappy Intel Hd Graphics card but i run wow on the blizzard server, and have played vanilla, tbc etc on other servers without issues.)

EDIT:
Found an alternative download link in the forum so this part is solved. Still i leave the message in case someone have an idea of what the problem is with the grey screen.

If no one knows:
I wanted to download the game again (with the old version this time because i don't like the wod one) and when i do so it stays for hours charging in BitTorrent saying it weights 0 (nothing). And after hours the download have not even started.. anyone have an idea why? Is there a problem with the file?

Hope someone can help