Quote:
Originally Posted by elcreative
if you are using older (and not upgraded) software then 32-bit usage is often needed... the same goes with PCs and things like compatibility mode.
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Windows 7 and Vista automatically installs 32-bit-only software in 32-bit mode. They have one Programs directory for 64-bit and one for 32-bit, and your software goes wherever it needs to go. If it's installed in the 32-bit directory it runs in a sort of emulated 32-bit mode (can't remember the details right now), without the need for reboot or any other weird action on the user's part.
Really old or inflexible programs might need to be run in Compatibility Mode for older Windows versions, but the only ones I have ever had to do that with are games that were initially coded for XP and never patched/updated to support Vista properly.