Edit the registry to change ‘Warcraft III\InstallPath’
Windows 7 user
1)Run the Registry Editor: Start > type "regedit" on search bar >run
2)Navigate to HKEY_CURRENT_USER > Software > Blizzard Entertainment > Warcraft III
4)Right-click on InstallPath and choose Modify
6)Click OK, then close Registry Editor
7)Finally, Run patch
8)Enjoy the game