Repair Attempt Failure

I tried running a repair of v9.1.2109 because I can no longer delete junk mail from either of my mail accounts but the repair process failed and I receive this error code on every repair attempt:

The file ‘fil00314F58AEBE3706A06CE9222F5EC628’
cannot be installed because the file cannot be
found in cabinet file ‘MailClient.cab’. This could
indicate a network error, an error reading from the
CD-ROM, or a problem with this package.