How can it be.. Lets repair.. Simple by follow this.

· 1. Open the WinRAR application. Click on "File" and then "Open Archive" and browse to the damaged .RAR file.
·  2. Press "Alt" + "R" on your keyboard. This will bring up the WinRAR repair dialog screen.

·  3. Designate an easy-to-find location in the "Folder to put the repaired archive" box.
·  4. Check the box that says, "Treat the corrupt archive as RAR."
·  5. Press the "OK" button. Once it has finished repairing, a new archive will be built and placed in the location you designated.