A friend of me has this problem and he really wants to play the game. When he opens it he sees a box that says that it has a virus in it. He uses windows 10 if it helps. It gives like an error thats says ''The file isn't complte becauase there is a virus or possibly unwanted software in it.'' (i would show a picture but that doesn't work

Would need more information, did he buy it from gog and download directly from gog? The file(s) are all fully downloaded from this website to the machine? The. The virus scanner is throwing an error. All correct? If so then the virus scan is likely throwing a false positive, what scanner is it? I had a couple some time back which avira didn't like, but were fine. Ow I would never advise to ignore, definitely clarify all the facts, maybe check the file on virustotal website. If your a 100% sure the file came from gog then you should be fine.

It's been discussed before:

https://www.gog.com/forum/rayman_series/rayman_forever_infection

edit: And here:

https://www.gog.com/forum/rayman_series/rayman_being_flagged_by_antivirus_software

I'd be firing off a ticket to support ===>>>WITH SPECIFICS<<<=== off to support.