32 bit compilers

I have some legacy 32 bit Fortran compilers which I use and work great on XP. I have also tried the compilers on a Vista machine (32bit?) and they work fine. I would like to upgrade to a Windows 7 machine. I have tried my compiler on a Windows 7 home edition desktop and it does not work on the dos window.
My question is can I install a 32 bit version of Windows on a new machine or do I have to upgrade home to to Windows professional and get a new 64 bit version of a Fortran Compiler?

If you can run it in compatibility mode it may work. I have older programs that won't work in in the command prompt.
You'll just have to test unelss you happen to find someone with your same software.

All you need is a 32 bit complier. I would throughly test what I had before I spent any money. You an evaluate any version of 7 for several months before you have to pay.

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