Don't delete that file yet. A CRC error doesn't always mean your ROM is dead. It means the data you have doesn't match the checksum it expects. Here is how to save your save your knockout.
If that fails, the "Torrent Re-Check" method is your secret weapon. Remember: that sces-01237 serial number is your friend. It tells you exactly which version you have, allowing you to find specific patches and fixes. tekken 3 -e- sces-01237 .rar 1 corrupt archive -crc error-
The website or FTP server you downloaded the ROM from might have originally uploaded a faulty archive. If the uploader’s hard drive had bad sectors, or if their internet cut out during upload, the corrupted version was propagated to everyone who downloads it. Don't delete that file yet