If this specific file is an "Online" fix, you usually need to copy and paste the contents of the extracted folder into your main game directory, overwriting existing files.
For detailed video guides on extracting and installing these specific archives, you can check the HaDoanTV Tutorial page . [HaDoanTV.Com]ES.ON.rar
Disable your antivirus or add an exclusion for the game folder, as cracks and online fixes are often flagged as "false positives". If this specific file is an "Online" fix,
Use a tool like WinRAR or 7-Zip to extract the .rar file. If prompted for a password, it is almost always hadoantv.com . [HaDoanTV.Com]ES.ON.rar
Ensure you have downloaded all parts of the game if it was split into multiple .rar archives.