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Migration from 32-bit to 64-bit

Posted on 2007-03-21
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We are migrating from 32-bit Windows 2000 to 64-bit Windows 2003 R2 Standard. Need to know if 32bit compiled code will seamlessly migrate from old server to new. Thanks!
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Question by:currysecureaquote
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Lee W, MVP earned 125 total points
ID: 18766851
You have to TEST everything.

MOST 32 bit code SHOULD run without a problem - but even going from 32 bit 2000 to 32 bit 2003 is NO GUARENTEE that your programs will work - the kernel changed.  

One thing you need to be aware of, 16bit code will NOT work.  Further, some 32bit apps are still using 16bit installers which could mean that even though the program will run fine - you can't install it!
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