Where can you get a copy of Windows 95,98, or do i need to buy one? B

I have tried everything to get FPSF 97 to work on XP, from a virtual pc to DosBox. Everything seems fine in DosBox till i try to run it and it says i need windows!!!!!!!!!!!! 🙁 Please can someone help me. Apparenty most old sierra games dont work on XP????????????