After restoring, run the program again. The error should disappear.
Add the parent folder to your antivirus to prevent future deletions. 2. Verify the Installation Directory
A missing or faulty Visual C++ Redistributable is a classic cause of game launch failures.
Your AV silently removes or quarantines u4.exe during or after installation.
Reboot after each. This rarely fixes the specific error but improves overall stability.
