Because is usually a component of a larger software suite (like the EA App or a specific video game), the safest and most effective way to restore the file is to reinstall the software causing the error.
Before deleting or replacing a file, check where it currently resides on your system. Legitimate files usually reside in a subfolder of C:\Program Files or C:\Program Files (x86) , specifically within the game publisher's folder (e.g., C:\Program Files (x86)\Electronic Arts\... ). activationui.exe download
sfc /scannow
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