Hello guys, I'm coming here in last resort...

So, I buy and launch Cyberpunk 2077 yesterday.

I download it, then, turn off my computer because it was time to sleep.

today, after turning on my computer, GOG wouldn't start, no message, nothing happening, it just wouldn't start, even with admin mods.

So I uninstall GOG, and reinstall it, download the game again, and GOG ask me to patch GOG, to which I answer yes.

And after installing the patch... Here ago was the bug... GOG wouldn't start.

So I uninstall and install again GOG, say NOPENOPENOPE to the patch, and was able launch the game, then lost 2 hours to be able to bind the keys as I want ( 2000+20 and not being able to bind your keys as you want in a game... ), and was finally able to play the game... Till I turn off my computer. to eat...

And after eating, turn on the computer... and here we go again... GOG won't start at all.

So please, does any one know what can I do?

GOG is a website. You can't install it, or uninstall it, or patch it.

Do you mean the galaxy client?
Try uninstalling the client, and downloading the game through your account, here.
https://www.gog.com/account

The convenience factor of clients reveals itself yet again.

sorry, I wanted to mean Galaxy client.

I already uninstall it and reinstall it 3 time... Thanx for the help, but reinstalling galaxy it each time I quit it or reboot my computer won't be a solution... :-/

I'm not trying to be snarky but may I ask why not just try without using Galaxy at all? GOG.com does still provide what they call "offline backup installers" which you can use to install the game, no Galaxy required (except for "MY REWARDS" section in Cyberpunk).

But have you installed it through your account, and not through galaxy, like I suggested?

I know Frodo and rjbuffchix have already suggested this, but for clarity:

You do not need to use the Galaxy client to play your GoG games.

If you use the website to download the games (the "offline installers") you don't need to use Galaxy at all. Assuming your problem is the Galaxy Client not working (rather than the game you're trying to play not working), this workaround should do it for you.

As much as GoG try to push it, Galaxy is an optional client (you don't miss much by not using it) - and thank God it's still optional.