1. All you need to do is download a clean 1.12 client. Use any of these provided links get yourself a client:
(If the site is not available or the links don’t work somehow you can use ANY CLEAN 1.12.1 (5875) Client you find on the web!)
2. After downloading the client you need to change your realmlist. To do so unpack the client you just downloaded.
3. Locate the file “realmlist.wtf” and open it with Editor/Notepad
4. Change the realmlist to:

This is probably one of the most frequently asked questions so I decided to just make a video for you guys and show you how it's done. Client WoW 1.12.1 Win US. File name: client1.12.1.zip File type: Archive/zip Version: Vanilla Size: 5,2 Go MD5 Sum: ce3e417db97998c604b050619fb941d0. Since we all know, there is a high chinese community in Nostalrius Begins, so i managed to upload the zhCN Client for the 1.12.1 version of World of warcraft, with the paths to it's succeful installation. Guide 1) Download the CN client installation (.zip), and extract the folder it contains. (Winrar or similar program needed). Download WoW vanilla client 1.12.1 portable with hash 314182d89c426ec573640f74dcb21a9fcd4a055f and name WoW vanilla client 1.12.1 portable for free. Millions of other.

Wow 1.12.1 Vanilla Client Download
set realmlist ptr.darrowshire.com

5. When you successfully changed your realmlist its time to create an account. Click here to create an account:
Wow 1.12.1 Vanilla Client
6. Start the the game and login with your newly created account. Have fun on the PTR!