Looks like I’m not the first with this issue: http://mantis.gog.com/view.php?id=5483
Is this another false positive? It’d be nice to be able to remove GalaxyUpdater.exe from the chest without DELETING it, so I could upload it to VirusTotal for further analysis, but that’s the ONLY option I get. It’d be nice to have the most recent version of the Galaxy client.
Well, I got the updater whitelisted, now it’s claiming GalaxyClient.exe’s infected, too. 
Here’s a VirusTotal linky for the GalaxyUpdater.exe: https://www.virustotal.com/#/file/ed87fdd73fdef1cc2606a34f3da892118ead276795663139f8199f357ca9378f/detection
Here’s a VirusTotal linky for the GalaxyClient.exe:
https://www.virustotal.com/#/file/e6ebd97241f85d21c3f60e49ea1f5de11c3caa045d081cc29368342902c4165a/detection
VirusTotal linky for GalaxyClientService.exe:
https://www.virustotal.com/#/file/2338ba5b18fb8c536e50abbfc0eed5df410b1ab1a5454fdd3917b768dbf7b9c5/detection
Only Avast and AVG seem to have a problem.
How to report >> https://forum.avast.com/index.php?topic=14433.msg1289438#msg1289438
and next time report in correct forum section
Avast Free Antivirus / Pro Antivirus / Internet Security/ Premier
Avast Free/Pro/IS/Premier topics and issues, not viruses or false alarms here!
Sorry about that, would a Mod please move this to the correct forum section, please?
As a side note, I ended up having to boot from a live disk to make those submissions, the system would not let me touch those files to upload them, even with all of Avast’s shields disabled, and all files in the respective directories whitelisted. Also turns out, that even though I told the Avast popup to make an exclusion for these when it detected them, no exclusion entries were ever created.