Fuxtain is right there is no need to install.
It seems that you don't have access to do changes to that folder.
Try Fuxtain fix first by changing the location to somewhere you like.
That should fix it.
If it doesn't you can change the permissions to wow folder.
Windows:
Type cmd in the search bar. (Will open Command Prompt)
Code:
icacls "<Location to Wow Folder> " /grant Users:F /T
That will grant Users full access to the wow folder and all files and sub-folders.
Read more about iclas
Mac Os / Linux
Open a terminal
Code:
chmod 755 <Location to Wow Folder>
This changes the permissions of the folder to rwxr-xr-x.
Read more about chmod
If that doesn't work let us know.
If you this helps leave a message in my profile =) Visitor Message