It would be better to use NT4 or Windows 2000. Delphi had a habit of crashing hard under 9x whilst debugging and taking the OS with it. I used Delphi from 1 - 5 commercially and we never used 9x because the experience was a lot less usable. I did use maybe, Delphi 3 under Windows 98 at home, but it would never have been for anything important.