🎮 Game Error Codes What it means & how to fix it

GOG Galaxy Error Codes

GOG Galaxy leans on message-based errors rather than numbers — most are a blocked connection, a locked install folder, or a corrupt download. Here's each one and the fix.

Error codes

Couldn't reach GOG servers Galaxy can't connect to log in or download

Cause: A firewall/antivirus block, VPN, or a temporary GOG server outage.

Fix:
  1. Check the GOG status page for outages.
  2. Allow GOG Galaxy through your firewall/antivirus and disable VPN.
  3. Flush DNS (ipconfig /flushdns) and restart the router.
  4. Use Galaxy › Offline Mode to play installed games while servers are down.
Installation failed A game couldn't finish installing

Cause: A corrupted download, insufficient disk space, or antivirus locking the installer.

Fix:
  1. Right-click the game › Manage installation › Verify / Repair.
  2. Clear the download cache: Settings › delete files in the Galaxy 'webcache'/'DownloadCache' folder.
  3. Whitelist the install folder in antivirus and retry.
Files integrity check failed Installed game files are corrupt or modified

Cause: An interrupted update, a failing drive, or a mod/antivirus altering files.

Fix:
  1. Manage installation › Verify / Repair to re-download bad files.
  2. Move the game to a different drive if the disk is failing.
  3. Temporarily disable real-time antivirus during the repair.
0x80004005 (Unspecified error) Generic Windows failure during install/launch

Cause: Permission issues on the Galaxy folder or a blocked file operation.

Fix:
  1. Run GOG Galaxy as administrator.
  2. Reinstall Galaxy keeping games (installer detects existing games).
  3. Exclude the GOG Galaxy and games folders from antivirus.
Access is denied Galaxy can't write to the install location

Cause: The install folder is read-only, on a removed drive, or owned by another account.

Fix:
  1. Run Galaxy as administrator once.
  2. Move the install path to a folder you own (avoid Program Files).
  3. Reconnect the external/secondary drive if the games live there.
Can't log in / stuck on 'Signing in' Galaxy hangs at login

Cause: A corrupt local config, wrong system clock, or a blocked auth endpoint.

Fix:
  1. Fix the Windows date/time (set to automatic).
  2. Delete the Galaxy config/database in %ProgramData%\GOG.com\Galaxy\storage and relaunch.
  3. Disable VPN and retry.

Fixes that work for most GOG Galaxy errors

  1. Fully quit the launcher from the system tray (right-click › Exit), then reopen it — a half-loaded client throws most generic errors.
  2. Restart your PC and router, and on Windows flush DNS (Command Prompt: ipconfig /flushdns).
  3. Update or reinstall the launcher/client to the latest version — many 'connection' or 'version' errors are just an out-of-date client.
  4. Temporarily disable VPN and add the launcher as an exception in your antivirus/firewall, then retry.
  5. Check the service's official status page or its X/Twitter — if the servers are down for maintenance there is no local fix; wait it out.

FAQ

Why can't GOG Galaxy reach the servers?

Usually a firewall, antivirus, or VPN is blocking it — or GOG is having an outage. Check the GOG status page, whitelist Galaxy, disable VPN, flush DNS, and restart your router. You can still play installed games by switching Galaxy to Offline Mode.

How do I fix a GOG Galaxy install or integrity error?

Right-click the game › Manage installation › Verify / Repair to re-download corrupt files. If it keeps failing, clear the Galaxy download cache, whitelist the install folder in antivirus, and make sure the drive has space and isn't failing.

Other games