how i can update my warcraft to 1.24 with a copied warcraft (ctrl c - ctrl v) ??!?!

i have this problem

Blizzard PrePatch v2.70 compiled on Jul 7 2003
This program patches Warcraft 3

Log created at 1:20 pm on 11/27/2009

Registry error loading key 'Warcraft III\InstallPath'
O sistema não pode encontrar o arquivo especificado.


RESULT: Prepatch failed