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Windows 7: Compatibility Mode: 32-bit versus 64-bit

28 Dec 2010   #1

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
Compatibility Mode: 32-bit versus 64-bit

This post refers only to "compatibility mode", not "XP Mode".

I realize some apps won't install on 64-bit at all--such as those with 16 bit installer programs. Let's set those aside and consider ONLY apps that will install on both 32-bit and 64-bit Windows 7.

With that exception, imagine someone who is concerned about running some older apps on an upcoming Windows 7.

Is that person more likely to have success with "compatibility mode" if he also chooses a 32-bit install?

Or will he have identical success with "compatibility mode" on a 64-bit install?

I know people who are pondering this and who would never, ever even look at XP Mode or dual boot. They just want to be able to run their existing stuff.

Any insight appreciated.

Is there a semi-authoritative list of older or obscure apps known to fail completely on 32-bit compatibility mode? Or on 64-bit compatibility mode?

My System SpecsSystem Spec
28 Dec 2010   #2

64-bit Windows 10 Pro

As long as the app was not 16-bit, then "Compatibility Mode" would work the same in either 32-bit or 64-bit Windows 7.

Hope this helps,
My System SpecsSystem Spec
28 Dec 2010   #3

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit

Thanks, Shawn.

I guess that leaves the question of 16-bit apps and I imagine most less than tech savvy types would only be guessing on that and that it has caused some consternation.

I do know that some 32-bit programs won't install on 64-bit Windows due to the 16-bit installer. Earlier versions of Photoshop for one.
My System SpecsSystem Spec

28 Dec 2010   #4

64-bit Windows 10 Pro

It's pretty much a guessing game if a program has a 16-bit installer or not unless specified by the program. Luckily it's usually old programs that may.

One could use Windows 7 Compatibility: Software Programs & Hardware Devices: Find Updates, Drivers, & Downloads to check and see if the program may br listed as being compatible with 64-bit Windows 7 though.
My System SpecsSystem Spec

 Compatibility Mode: 32-bit versus 64-bit

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