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I was curious if such is possible. I copied Vista calc.exe to Windows 7 and it doesn't start. I tried running it in compatibility mode and still nothing. Windows 7 clearly doesn't like Vista :)

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Google says no, in fact returns nothing for installing Vista's calc in W7...some of vista's exe's work in compatibility mode, some just do not work. –  Moab Feb 21 '12 at 3:41
Any particular reason you need or like Vista's calc? –  Moab Feb 21 '12 at 3:43
@Moab the answer is simple -- it sucks! I'm using it while programming and constantly need to switch between hexadecimal and decimal formats but then I may need to also use fractional calculations but for some reason the calc in Windows 7 needs to be switched from Programmer mode just to do floating point calculations. Hate it! –  ahmd1 Feb 21 '12 at 9:09
I have not tried this one, see if it meets your needs...microsoft.com/download/en/… –  Moab Feb 21 '12 at 19:28
Hah, thanks. But honestly that's the ugliest calculator ever :) I actually got hold of the calc.exe from Windows XP and it works perfect on Windows 7 as well. –  ahmd1 Feb 21 '12 at 19:44

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