get the versions prior to 2.0
if you cant find it, you can grab it here

https://www.mediafire.com/file/t469on47xmyc7c1/gog-galaxy-1-2-67-58.exe/file

I am really puzzled why devs are slowly pushing for win10+ upgrades, instead of just keeping Linux/W7 friendly. However, for something as simple as a game launcher. Seems an overkill. I took a look at the API/URL used for game and achievements as well as user info and it has nothing much to do with an OS. It is most if not all metadata. that one can simply pull off any browser - which I believe that is what the client is - and giant browser. From what I can see, it is using a similar design as A.O.L. used back in the 90's to surf the web.

Maybe a different topic. That comment struck a match. "HAVE TO UPDATE to newest windows", is false.

Can't launch GoG Galaxy 2.0, double click seems to load (the procces appears on the task manager) and nothing, then the procees dissapear from the TM.
Win 10 home.
Ryzen 3 2200g
1050ti 4gb,
16 gb ram ddr4.

that version does not work for me (win10 - i'll prob boot to win7 to see that still works)

I've had issues with GOG Galaxy for months now. I dual boot Windows and my 2.0 beta for 10 x64 doesn't update at all and gave me some other issues I can't quite remember because I haven't logged into that (trash spyware)OS in over 6 months now.

Anyways, I just picked up some new games and tried the latest version of GOG Galaxy (2.0.41.150) for my Windows 8.1 x64 system, thinking maybe it finally works now, and much like you it DOESN'T EVEN LAUNCH. This is really headache inducing.

Well, I found one that works...

https://cdn.gog.com/open/galaxy/client/setup_galaxy_1.2.67.58.exe

I like the idea of Galaxy 2.0 but it's very ambitious and just never properly works me. If you do decide to go with Galaxy 1.2.67.58 you might want to block the updater with your firewall. The updater is located in... C:\ProgramData\GOG.com\Galaxy\redists\GalaxyUpdater.exe
If you can't find it lookup how to enable "hidden files and folders" for windows.

Finally a real human!!! LOL. Talk about pushing spyware on people - and they LIKE IT!! (some defend it)
Ya same one I been using. Just checked on my W7 nothing past v2.0 works there either. Not sure what the deal is with devs becoming engaged with W10+.

I think they are gunning for #2 steam, and therefore trying to match the client for client. Even steam works flawlessly on W7 (and some earlier).

O well, Maybe I'll write my own launcher LOL (hey don't laugh, I already wrote 2 back ends for Minecraft, launchers for consoles EMUS', massive editor for WoW private servers - currently working on an editor for dosbox conf files, meh so I get bored hahhah)

Why isn't this fix already? has beed a few day now and i'm still unable to launch galaxy it's getting annoying. I even try re-installing but nothing, c'mon guys.

So plopped a fresh W7 and watched the error. here is what came up. Seems a little more descriptive

Problem Event Name: BEX
Application Name: GalaxyClient.exe
Application Version: 2.0.41.150
Application Timestamp: 611ccf93
Fault Module Name: StackHash_a7aa
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 74695f6d
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: a7aa
Additional Information 2: a7aa91f17ea749d42a4de3b390fa5b3d
Additional Information 3: a7aa
Additional Information 4: a7aa91f17ea749d42a4de3b390fa5b3d

On fix for BEX errors is to turn off DEP, but the client is set to have it on always. Is that needed? Or was that on default when compiled?

Doesn't work, getting the black screen of death. Hurry up and fix it already!!!

[Deleted]
Sorry, different problem.

use this for now... it works

https://cdn.gog.com/open/galaxy/client/setup_galaxy_1.2.67.58.exe

since today at noon gog galaxy no longer runs. the login does not seem to work. upgrade via setup exe does not work either.after about 30 seconds i only see this attached message and i can only get rid of it by pressing ALT + F4.

In the folder %programdata%\GOG.com\Galaxy\logs I found in the file GalaxyClient.log

01:12:00.005 [Information][ (0)] [TID 30504][galaxy_client]: Log started. Application version: 2.0.41.150 (2021-08-18 10:55).
2021-08-23 01:12:00.005 [Information][ (0)] [TID 30504][galaxy_client]: Operating system: Windows 10 10.0 (Build 19043) (IA32)
2021-08-23 01:12:00.005 [Information][ (0)] [TID 30504][galaxy_client]: Continuing logging after switching log files from 'C:\ProgramData\GOG.com\Galaxy\logs\GalaxyInitialization.log' to log to 'C:\ProgramData\GOG.com\Galaxy\logs\GalaxyClient.log'.
2021-08-23 01:12:00.005 [Information][ (0)] [TID 30504][galaxy_client]: Starting application...
2021-08-23 01:12:00.005 [Information][ (0)] [TID 30504][galaxy_client]: Reloaded without any launch parameters.
2021-08-23 01:12:00.014 [Information][ (0)] [TID 30504][galaxy_client]: The 'Galaxy Client SSL Manager' SSL manager is initialized.
2021-08-23 01:12:00.017 [Information][ (0)] [TID 30504][galaxy_client]: Threads created for HttpClient: download=32, regular=10, high=3
2021-08-23 01:12:00.363 [Information][ (0)] [TID 30504][galaxy_client]: Created presence manager with initial presence 'online'.
2021-08-23 01:12:00.363 [Information][ (0)] [TID 30504][galaxy_client]: Initializing application.
2021-08-23 01:12:00.386 [Information][ (0)] [TID 30504][galaxy_client]: ETags DB is up to date. Schema version: 2.
2021-08-23 01:12:00.388 [Information][ (0)] [TID 30504][galaxy_client]: Sending message of type 19 [Sequence Number: 2514227114], rseq 0, size 149 (bytes sent: 149), completed OK
2021-08-23 01:12:00.388 [Information][ (0)] [TID 30504][galaxy_client]: Request sent [Sequence Number: 2514227114], waiting for response...
2021-08-23 01:12:00.389 [Information][ (0)] [TID 30504][galaxy_client]: Sending data for the write vulkan registry keys request to client service succeeded.
2021-08-23 01:12:00.409 [Warning][ (0)] [TID 15040][galaxy_client]: Base CEF User-Agent not available, adding default one.
2021-08-23 01:12:00.839 [Information][ (0)] [TID 30504][galaxy_client]: Did not find a value under the preference key 'previewBuildsEnabled' while reading.
2021-08-23 01:12:00.852 [Information][ (0)] [TID 30504][galaxy_client]: Successfully brought window to the foreground.
2021-08-23 01:12:00.948 [Information][ (0)] [TID 30504][galaxy_client]: Did not find a value under the preference key 'previewBuildsEnabled' while reading.
2021-08-23 01:12:00.948 [Information][ (0)] [TID 30504][galaxy_client]: Did not find a value under the preference key 'previewBuildsEnabled' while reading.
2021-08-23 01:12:00.948 [Information][ (0)] [TID 30504][galaxy_client]: Did not find a value under the preference key 'previewBuildsEnabled' while reading.
2021-08-23 01:12:01.500 [Information][ (0)] [TID 30504][galaxy_client]: Internet connectivity changed: was online=false, is online=true, last online=1137ms ago.
2021-08-23 01:12:01.501 [Information][ (0)] [TID 30504][galaxy_client]: Changing number of HttpClient download threads: 32 -> 10
2021-08-23 01:12:01.507 [Information][ (0)] [TID 30504][galaxy_client]: Found existing refresh token. Attempting to sign in.
2021-08-23 01:12:01.593 [Information][ (0)] [TID 30504][galaxy_client]: OnlineStateMonitor changed state from '824' to '822'.
2021-08-23 01:12:08.722 [Error][ (0)] [TID 5992][galaxy_client]: Reading generic JSON buffer failed. Buffer: <HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY>
An error occurred while processing your request.<p>
Reference #97.7d6edd58.1629673928.4428c0e
</BODY></HTML>
Exception: JSON Exception (error: 1: unexpected byte, '<'), code=0
2021-08-23 01:12:08.722 [Error][ (0)] [TID 5992][galaxy_client]: Could not parse the response! Response: <HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY>
An error occurred while processing your request.<p>
Reference #97.7d6edd58.1629673928.4428c0e
</BODY></HTML>

2021-08-23 01:12:08.816 [Information][ (0)] [TID 30504][galaxy_client]: Authentication failed. Showing login form again.
2021-08-23 01:12:08.826 [Information][ (0)] [TID 30504][galaxy_client]: Successfully brought window to the foreground.
2021-08-23 01:12:08.944 [Warning][ (0)] [TID 15040][galaxy_client]: Access token isn't valid! Request with URL '[url=https://auth.gog.com:443/auth?client_id=4689...5655&redirect_uri=https%3A%2F%2Fembed.gog.com%2Fon_login_success%3Forigin%3Dclient&response_type=code&layout=galaxy]https://auth.gog.com:443/auth?client_id=4689...5655&redirect_uri=https%3A%2F%2Fembed.gog.com%2Fon_login_success%3Forigin%3Dclient&response_type=code&layout=galaxy[/url]' will be sent without access token.
2021-08-23 01:12:24.123 [Information][ (0)] [TID 30504][galaxy_client]: Did not find a value under the preference key 'previewBuildsEnabled' while reading.
2021-08-23 01:12:39.001 [Information][ (0)] [TID 30504][galaxy_client]: Loading web page error: login

There were some server issues. It should be okay now.
Profile page and Galaxy not working ?