Mods, i'm posting this for my girlfriend as i need to go to work, and she needs the info before i go so she can contact blizz. Also may prove useful for others.
After running the update, the launcher wants to Optimize your install
Launcher Optimization process fails with:
"The folder you selected cannot be used, Please select a different folder"
Open WoW Launcher
"Updated Tools" downloads and automatically launches the Optimizer
Pop up appears with "Begin" and "Close Launcher" (after a few seconds the launcher auto closes leaving only the pop-up)
clicking "Begin" returns the above error
The wow install on this PC is a little unusual as it has the WoW folder as the root of a second Hard disk (e on her PC (OS drive is too small to hold it)
Wow is the only program/file on the drive, it is not used for anything else.
To be more clear, the wow folder IS the root of the E: drive. (there is no "Wow folder" in which the files are stored)
Tried to use the wow repair program and she gets "Download is not authorized" and it disappears.