so i keep getting this errorwhen i try to extract a iso from an archive in winrar. it says "this archive is unknown format or corrupted. now i try to open winrar itself and repair it thru that but it freezes for some stupid reason even though showing 100% complete,it does not say "Done!" when i try to repair it as a Zip file,it works but the archive is then empty..i even tried through 7Zip and that didn't work.help?