Launcher issuesMismatch data warningIf there is a mismatch data warning, the launcher creates a log file listing any files in the install folder which are not expected, as well as files in the Mods folder. To check it, copy
%LocalAppData%\Larian Studios\Launcher\Cache into the location bar in Explorer and hit Enter, then look for a text file named steam_4.1.1.2064610_alteredFiles.txt (or similarly, starting with 'galaxy_', for the GOG version).
Old mods or partial pak files left over from a problem with an update are more likely to cause game issues; stray text files, etc, should not cause a problem, but they should be cleaned up anyway, to eliminate the warning (if you are not going to be using any mods that are compatible with patch 9).
Starting with patch 7, the game uses the local AppData folder for the current user account: 'C:\Users\<UserName>\AppData\Local\Larian Studios\Baldur's Gate 3'.
For compatibility, if there is no local AppData folder for the game when it is started, but there is a game folder in My Documents, it will copy the profiles and configuration files over from the Documents folder, but that may mean copying old mods there, as well. If you didn't already check this, if applicable, the easiest way to get to that folder would be to copy the line
%LocalAppData%\Larian Studios\Baldur's Gate 3\Mods into the location bar in Explorer and hit Enter.
.Net Core error message when starting the launcherIn Windows Control Panel, Programs and Features, try right clicking the Microsoft Windows Desktop Runtime entry (6.0.x), select Uninstall and then Repair.
If that does not help, repeat the process but continue with the uninstall, reboot and then try installing the .Net Core redistributable. The minimum required version is 6.0.11, which can be found in the '..\SteamApps\common\Baldurs Gate 3\DotNetCore' Steam install folder (or
this download), while the most recent version can be found
here.
The launcher crashing on startup, or not displaying the 'get started' or 'play' buttonsAre you shutting down all non-essential programs (especially anti-virus) before starting the game? Firewalls can cause conflicts (generally on startup or loading screens) and overlays from graphics tweaking/monitoring programs or chat programs can also cause issues.
Try verifying local files: in the Steam library, right click on the game and select Properties, switch to the Local Files tab and then click on the 'Verify Integrity of Game Files...' button.
With the GOG version, in the (optional) Galaxy client, select the game, then the settings icon at the top right (beside the Play button) and under Manage Installation select 'Verify / Repair'.
Try starting the launcher directly from the '..\SteamApps\common\Baldurs Gate 3\Launcher\LariLauncher.exe' executable.
If possible, try resetting the launcher in the options (button with the gear icon in the bottom left of the launcher window), then exit and restart the launcher. If that helps, there should be a 'get started' button to click on, and then you can either create or log in to an account, or there should be a button to skip creating an account in the lower right, along with a checkbox to not ask again.
Try copying and pasting
%LocalAppData%\Larian Studios into the location bar in Windows Explorer, hit Enter, and then in that folder delete or rename the 'Launcher' folder and try starting the launcher again. If that helps, the first time the launcher starts it may take a little longer, as the cache is rebuilt.
If the issue is the launcher not displaying the start page properly, try temporarily disconnecting from the internet and see if that gets the launcher working. If it doesn't get a response checking for updates (latest news, the notification messages before major patch releases, etc), there should be an offline version of the launcher page shown.
If you check the Event Viewer, does that give an error code or 'Faulting Module' file name that might help identify the cause of the crash?
- click Start (or WinKey-R), then type "event viewer" into the search box. in Windows 10, 'event' should bring up 'View event logs'.
- after starting the Event Viewer, expand 'Windows Logs' in the left column and select 'Application'
- in the center column, look for a recent error for the game (maybe sort by Date and Time, or search for 'LariLauncher')
- check the information under the 'General' tab below the list of events, starting with "Faulting application name..."
If that does not help, please copy and paste
%LocalAppData%\Larian Studios\Launcher\Logs into the location bar in Windows Explorer, hit Enter, and from that folder contact support with the runlog.txt file.
Also include a dxdiag report (WinKey-R, type in dxdiag and hit enter, then when it finishes loading click on the 'Save All Information...' button and save the report somewhere handy), check the '..\Baldurs Gate 3\Launcher' install folder for the gold.log file, and if there are any CrashDump files being created, zip a few together to include.