Crimson Desert Guide

"There may be a problem with the game installation. Please reinstall": how to fix it

Crimson Desert won't launch and says to reinstall, even after you did? Players fixed it by removing mods, deleting old leftover folders or wiping the game folder.

Mechanics · Updated

Steps

  1. Remove or update your mods. Outdated mods are one of the main causes after an update. Turn them off in your mod manager or remove them, then launch again. Several players said the error was gone as soon as their mods were.
  2. Verify the game files in Steam. Right-click Crimson Desert in your Steam library, choose Properties, then Installed Files, and click Verify integrity of game files. On its own this often doesn't fix the error, but you'll need it after the next step.
  3. Delete the old folders Steam left behind. In Steam, choose Manage, then Browse local files. Delete the folders that weren't changed on the day the game last updated. Players named folders like 0036 and 0037. Then verify the game files again so Steam downloads clean copies.
  4. Still broken? Uninstall and wipe the game folder. Uninstall Crimson Desert in Steam, then open your Steam library folder (by default C:\Program Files (x86)\Steam\steamapps\common) and delete whatever is left of the Crimson Desert folder. Reinstall the game from Steam.

The problem: you click Play and Crimson Desert stops with “There may be a problem with the game installation. Please reinstall.” You reinstall, maybe twice, verify the files, and the same message comes back. It hit lots of players after the big updates in March and August 2026, and new threads about it were still showing up on Steam this week.

The short answer: a normal reinstall often isn’t enough, because Steam leaves old files in the game folder. Players got past the error by removing outdated mods, deleting the leftover folders from before the update, or, when that failed, deleting the whole game folder before reinstalling. The player who asked about it on October 27 cleared out the game folder and reinstalled, and confirmed the next day that it worked.

Why reinstalling doesn’t fix it

Uninstalling and verifying only deal with the files Steam knows about. Anything added later, like mod files, or old data folders that an update no longer uses, can stay in the install folder and keep tripping the check. That’s why the fixes below all come down to getting those files out of the way.

Fix 1: take your mods out

If you use mods or a mod manager, start here. Several players found the error was caused by mods that hadn’t been updated for the latest patch, and it went away once they turned them off or removed them. Pearl Abyss is releasing a base game patch alongside the Charting the Unknown DLC on October 29, and players on Steam recommend removing mods before a big update like that and putting them back once the mods are updated.

Fix 2: delete the outdated folders, then verify

This is the marked answer in one of the Steam threads, and other players confirmed it got them running again:

  1. In your Steam library, right-click Crimson Desert and choose Manage, then Browse local files.
  2. Look at the dates on the numbered folders. Delete any that weren’t modified on the day the game last updated. Players named folders like 0036 and 0037, and one also had 0016.
  3. Back in Steam, open Properties, then Installed Files, and click Verify integrity of game files so Steam downloads anything that’s missing.
  4. Launch the game.

If you’d rather not delete anything yet, one player renamed the 0036 folder to 0036_Backup instead, and the asker in that thread said it worked. The player who posted the marked answer also set the game’s exe in the bin64 folder to run as administrator before verifying.

Fix 3: wipe the folder and reinstall

When the steps above don’t help, do a clean install:

  1. Uninstall Crimson Desert from Steam.
  2. Go to your Steam library folder. By default that’s C:\Program Files (x86)\Steam\steamapps\common, or wherever you installed the game.
  3. Delete what’s left of the Crimson Desert folder. Players who checked after uninstalling found plenty of old files still in it.
  4. Reinstall from Steam.

Players who used Fix 2 or Fix 3 said their save games weren’t affected, because saves aren’t kept in the game’s install folder.

Good to know

  • Clearing Steam’s download cache or repairing the library folder comes up a lot as a suggestion, but players who tried it said it didn’t fix this error for them.
  • It’s a big download. Fix 3 means downloading the whole game again, so try the mod and folder fixes first.
  • If the game launches but then crashes, see Crimson Desert crashing on PC? Fixes players confirmed.

Sources

This guide summarizes answers from these community threads. Credit goes to the players who worked it out.