I'm no expert, but you need to find out what computer language your disk is in - that's the only reason your pentium won't read the data.

It is the computer language and operating system rather than the brand or model of computer.

For instance, without some software converter, you cannot read some Windows files on a MacIntosh and vice versa.

You have three options.

1/ Take your disk to a specialist software shop that backs up and converts medium and formats.

2/ Pay a programmer to decipher the program.

3/ Find out by process of elimination, exactly what the code is doing step by step as you enter data. You could then build a new version or create an awkward spreadsheet that will do the same calculations.

Personally, I'd go with option 3.