I have posted a similar query on the software site but the problem does seem to stem from the operating system. I have a small program which calculates interest for specific purposes where the rates on interest have varied over the years. It worked on Windows 3.11 which I still have on an old machine. It doesn't work on the OS from W95 through W98 or millennium. I get the error message
Floating Point: Overflow

Does anybody have any idea why this should happen and can I get around it?