Wow patch stuck on updating setup files
Out-of-date drivers and operating systems can cause a variety of issues and are one of the first things to check when a game is having problems.The instructions below will help you check and update your drivers.
under Dial Up and Virtual Private Network Settings delete ALL old networks you're not using, downloader/updater is sometimes trying to use those connections and failing to start. Go to C:\Program Data (hidden folder, you have to enable show hidden folders; Program Data folder is on the drive you installed OS on) and delete both and Blizzard Entertainment folders 3.
Select 0 kb/s for both up and down stream which means unlimited transfer rates.
The default setting for background and beta streaming is 100 kb/s.
I've have sometimes had this problem before where the download just stops or is just crawling. Otherwise try looking at Blizzards troubleshooting forums What does the download report as a warning/error? Try to look for an alternative way to get the download; if not, get a friend to get you the cached files.
This will probably not work for everyone but it worked for me so it might help you if your wow launcher isn't downloading the patch or if it's extremely slow to download it (like 1k every 5 mins) Also note that this is with Windows 7 Premium after that my download was going at 1.6 - 1.8 Mb/sec :) Also remember to go check the ''Automatically detect settings'' box again after your done, apparently it might cause problem later with your internet if you leave it unchecked (that 's what someone told me) Hope it help ;) Go into "Options" and select "Patch & Update Settings" and scroll down to hidden fields.