Right so i delete world of Warcraft entirely of my PC and now have re-installed it of battle.net, the blizzard download-er. I had a persistent problem whilst downloading the game my internet kept on cutting out and starting back up again leaving the download on extremely low download speeds leaving having to close and re-download the game i kept my % of the game already downloaded.

I have now completed the game download to where it says "applying non-critical updates", this is my main issues now. It still keeps disconnecting me while on that section.
Any ideas what going on and how i can resolve this problem. Thanks.