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32-bit vs 64-bit systems

Will all 32 - bit applications work on a 64 - bit windows 7 Operating System?

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See Mr Fooz's and romkyns' answers on superuser.com/questions/56540/32-bit-vs-64-bit-systems – Mehper C. Palavuzlar Nov 1 '09 at 14:28
@Diago - I had searched this question and i am not able to find out . So i have asked this . But i think its most of answer .. thank you – joe Nov 1 '09 at 14:30
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closed as exact duplicate by Diago Nov 1 '09 at 14:28

This question covers exactly the same ground as earlier questions on this topic; its answers may be merged with another identical question. See the FAQ.

2 Answers

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Windows 7 (64-bit) has 32-bit emulation layer and all applications that work in Windows 7 (32-bit) will work with 64-bit version also.

However, 32-bit drivers will not work.

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up vote 1 down vote

Most will - some which make specific API calls may not (such as Anti Virus, Firewall, drivers or other "high level" software).

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