Epson ActionPC 2000 Read This First Manual page 29

If you see the error message CDR103
High Sierra or ISO-9660 format reading
drive n. Abort, Retry or Ignore,
did not accidentally insert an audio CD into the drive. Also,
some older games may not conform to the newer ISO
format; contact the game manufacturer for an updated
version of the game, if available.
2 6 Read This First
: CD-ROM not
make sure you