If you have a legitimate source (e.g., a friend with the same program, a backup, or the original installation media), you can copy u4.exe into the correct folder.

Select and navigate to your Uncharted installation directory (e.g., C:\Program Files (x86)\Steam\steamapps\common\Uncharted Legacy of Thieves Collection ). 3. Verify Game Files (Steam/Epic Users)

Open your dosbox.conf file (often found in the game folder). Scroll to the [autoexec] section at the bottom.

In some older versions of the software, the main execution file might actually be u4.com rather than u4.exe .

If the error appears only once and does not affect system performance or security, and you have confirmed it comes from a harmless orphaned reference, you can ignore it after removing the trigger. The error itself will not cause damage.