CAS error

Description:

This error may be caused by your computer due to a problem accessing or creating files.

Error code:

First solution:

• Check that the game is not being used by another program.
• If you download the game via a torrent, move the game to another disk on your computer.
• Do not put the game files in a secure folder.
• Make sure your game and related files are not blocked by your antivirus or security program.
• Right-click on your game folder, then "properties". Then uncheck the "read-only" box and do "Ok" and "apply these changes to this folder, subfolders, and files".
• Open the options of the explorer of files, tab display then validate "Show the files, folders and hidden drives". Go to your C drive, open the ProgramData folder and delete or rename the BlizzardEntertainment folder if it exists.
• Use CCleaner or another similar program to clean your locations.
• Go to your game folder and delete the Cache and WTF folder.
• Uninstall and reinstall the Firestorm launcher.
• Try to launch the game as an administrator.
• If it still doesn't work, right-click on firestorm.exe (or WoW.exe) then "properties" tab Compatibility, and check "Run this program in compatibility mode for: "Windows 7". Repeat the operation for firestorm-64.exe.

For WOTLK:
Download the zip below and follow the steps:
Zip link:
https://mega.nz/#!ByJg3AyK!L5rSTKOocMjc7O94OwJTKT6UwejuAPKLZW8fab0CcSM 

• Go to your folder containing the game
• Put the sub-folder "47" in the folder "Data\Config". Compatibility and check the box "run as administrator". Do the same for WoWx32.xtagstartz/li>
• Then launch WoWx64.