If the file keeps disappearing, a virus might be removing it. Run a full system scan using your antivirus or a trusted malware cleaner like Malwarebytes. Conclusion
Never download .exe files from random DLL download sites. They often contain malware.
Add your entire retro games folder to the antivirus exclusion list to prevent future deletions. Alternative Solutions u4.exe does not exist
Instead, u4.exe has been associated with:
Modern antivirus programs rely heavily on behavioral analysis and heuristics. Because Ultima IV was compiled decades ago, its file structure can sometimes trigger a false positive. If the file keeps disappearing, a virus might be removing it
A malfunctioning system update or corrupted hard drive sectors can cause files to disappear.
on PC. It typically occurs when your security software incorrectly flags and deletes the game's executable file during or after installation . Why this happens They often contain malware
Microsoft’s utility is more powerful than Task Manager or msconfig. It lists every location where a program can auto-start.
u4
Antivirus software, especially Windows Defender, frequently flags u4.exe (the file for Uncharted 4: A Thief's End ) or tll.exe (for The Lost Legacy ) as a false positive.
The error message itself may not say which program or process is requesting the file. To find out: