I was invited to participate in the GOG Alpha whenever that was still going on. Installed it and enjoy it quite a bit. However, now, when I try to install the GOG Beta, I get through the installation fine and when I try to open it, it gives me "Essential components needed to start GOG Galaxy are missing. Please reinstall the application." So, I redownloaded the installer after uninstalling it and restarting the computer, and then it gave me the same error.

How should I fix this problem? Also, here's a screenshot of the error box.

I am not sure if this will help, but I had a similar problem when I went to install the Galaxy Beta. It installed just fine, but when I went to open it, I got an error that I was missing mfc110.dll, and I needed to reinstall the program. Of course, that didn't work. The file in the error message seemed like it was on my system, but it would not register properly, so I tried reinstalling Microsoft Visual C++ Redistributable 2012, which the dll was from. Once I did that, everything worked just fine. Your error message is different than mine, so my story may be useless, but it could be the Galaxy installation process has the potential to corrupt certain visual c components (though no one else seems to be having these problems). Good luck on finding a solution.

I got the exact same error message. I downloaded and installed the Beta, launched and played around a bit with it. Then I thought it's better to have the application in another folder location so I uninstalled and installed again. This time it will not launch, giving me the error as the OP. I'm guessing something got deleted during the uninstalling that should not. But I have no idea what.

Oh, very good. Yes. The uninstaller does not clean up the services.
You should also delete the "GalaxyCommunication" service in the same way.

Uninstall the previous version of GOG Galaxy then both services, GalaxyCommunication and GalaxyClientService, using the SC Tool:
sc delete GalaxyCommunication
sc delete GalaxyClientService

After that, the reinstall on another location works fine!

I'm still testing the client, and report any news.

Greetings,

just got this error message myself after having uninstalled the galaxy client 1.0.0.871 and installing it again to a different installation folder.

In my case the problem were the 2 windows galaxy client services (GalaxyClientService & GalaxyCommunication), which the uninstaller previously wasn't able to remove correctly (please refer to "C:\ProgramData\GOG.com\Galaxy\logs\ClientServiceInstallation.log").

My solution: uninstall the Galaxy Client, remove the services from the registry (regedit -> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\GalaxyClientService as well as HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\GalaxyCommunication) -> Reboot -> Install the client again.

Good luck and be careful with editing the windows registry. I don't take responsibility for any possible malfunction of your windows system.

Regards!

UPDATE: Sorry for the redundant post! The other guys were faster... ;-)

You are a genius, tried your work around and it was PERFECT. This needs to be the #1 response so people can get this real solution! THANK YOU SO MUCH!

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I had similar problem. My solution was pretty easy but it help. I just restart computer and system download rest of files for GOG Galaxy client and now it works. So after installation the program just restart PC it should help like for me :)

It appears that the application installs some files to your default ProgramData folder, such as "C:\ProgramData\GOG.com" but searches for the files on the drive you chose for the install ie "H:\ProgramData\GOG.com".

So the solution is:
Copy or move the folder "GOG.com" from "C:\ProgramData\GOG.com" (default location) to "<drive where Galaxy is installed>:\ProgramData\GOG.com".

If you have moved ProgramData or installed windows to a different drive, you will need to change C: to that drive.

That's a simple error in the program where its using a relative path to the ProgramData instead of the environmental variable %ProgramData% location.

there is a bug I think in the windows services that runs out after a time frame
the two GCS and GC when removed and reentered the error is gone.

Thank you
I had also the same problem and after i delated GalaxyCommunity and GalaxyClientService it installed correctly :-)
gog.com should fix this bug because a lot of users don't even know to delete sth using a win console :-(

Lock here! Problem fix really fast:

https://www.youtube.com/watch?v=tOTn3vEPfiM

This solved my problem.

Thank you!