I'm having trouble installing The Witcher. The installer keeps telling me that it can't find part 1 of the package. Since part one is the installer itself, I'm assuming it means part two, but part two is in the same downloads folder as the rest of the files, however, when I try to specify the location, it doesn't let me. I'm wondering if, maybe, there was a problem with the download, for the following reason: on GOG parts 2-6 seem to be 1.5 gb, and part 7 is 1.2 gb, whereas the files I have, after the download, are all sorts of different sizes- 1,95,04 kb, 1,84,670 kb etc. Has something gone wrong with my download (I had them all downloading at the same time overnight), or is there some other fix I can try?

I've now re-downloaded both the installer, and the first part of the .bin files, and it is still telling me that it can't find the file.

Which method are you using to download your files, your internet browser or gog's downloader ?

In order for you to be able to install the game all 7 files, the .exe and the 6 .bin files, need to be in the same folder.

Have you renamed any of the files after downloading them ?

... and you have to download them in the same language version.