running 16 bit app on windows 8.1

I have a client that has an old app from 2003. I think that it is 16 bit, but I don't really know how to tell.
Will this app run on Windows 8.1? DoI have to add anything special to enable 16 bit?
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LostInWindowsAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I disagree with Wilder1626.  Windows x86 (32bit) will run MOST (but not necessarily all) DOS apps fine.  However, there are PLENTY of 16 bit Windows apps from the days of Windows 3.1 and even Windows 95 (which was mostly 32 bit),
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Lee W, MVPTechnology and Business Process AdvisorCommented:
It will run on Windows 8.1 32 bit.  It will NOT run on Windows 8.1 64 bit.  On a 64 bit system you could install virtualization software (such as VMWare Player, VirtualBox) and then buy another copy of Windows 32 bit, install that in a virtual computer, and then run it in the virtual computer running on Windows 8.1 64 bit.

It's worth noting, MOST (if not all) Windows 8.1 systems sold are 64 bit these days.
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Wilder1626Commented:
Hi

16 Bit applications are mostly DOS compatible, and since Windows doesn't emulate DOS, it wont work on Windows x86 or Windows x64.

To run DOS applications, you can use an emulator, like DOSBOX:
http://www.dosbox.com/
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dbruntonCommented:
If it is a DOS application don't use DOSBox.

Use VDOS http://sourceforge.net/projects/vdos/

Repeat after me, DOSBox is for 16-bit games and VDOS is for 16-bit applications.  Yes, DOSBox will/may run the applications but if you run into problems use VDOS.
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LostInWindowsAuthor Commented:
Thank you, I had no idea.
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McKnifeCommented:
You should try. 2003, you would not see many DOS apps around, so you can expect it to run.
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