A flicker in your Wi-Fi can lead to incomplete files.
Before you download extra software, try the built-in fix in WinRAR:
When creating your own archives in WinRAR, always check the "Add recovery record" box. This adds a small amount of extra data that makes the file much easier to fix if it ever gets corrupted. 🚀 Key Features of Advanced RAR Repair 1.2
It can handle archives larger than 4GB, which often trip up basic tools.
Turning off your PC while an archive is open is a recipe for disaster.
It looks for recoverable parts of the file that other programs might miss.