Cannot log in.

The file "C:\Users\Andrew's\Downloads\Wrath of the Lich King 3.3.5a\WoW.exe" is read only and cannot be overwritten. Please try installing to a different location. (ConflictManager::DeleteFile)

I get this message telling me i need to install in another location, but where do i download it to? and i can't delete it, someone help please :)

Un-tick 'read-only' on the WoW folder.

This worked but only for me to start getting wow errors every single time i tried to log into the game :/