after i downloaded witcher with gog downloader and it checked file integrity so there was not a problem but i when tried to install it says 4th bin file is corrupt and also its not joined together it was still chunk files.anyway can someone help with this issue or can i download 4th bin file specificly?

You can download the 4th bin file separately if you use your browser. Just choose it from the list after you click on The Witcher from your GOG Account page.

There might even be a way to rescue the file you did download... anyone know if the chunks can be reassembled?


EDIT: Just saw that you found this info in another thread. Did downloading the 4th bin file separately fix the problem for you?