will 32 bit work on 64 bit?

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I have a chance to buy the new Windows 7 32 bit for $50 through the school but my computer is Vista 64 bit. Will the 32 bit work?
 
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Your applications will have to be 32 bit, otherwise you should be okay. You will not be able to install 64 bit applications in a 32 bit environment. There is a way using VM. I have copied/paste an more thorough answer to your question below from another forum.


Your Operating System is your interface to the underlying hardware. Applications in modern operating systems have no direct access to the hardware and can only use it through system calls through the kernel.

So if your kernel (OS) only supports 32bit operations, applications using 64bit will not work.

Regarding virtual machines, your hardware doesn't have to be 64bit to simulate a 64bit environment inside a 32bit OS. There is an example of an 8bit AVR microcontroller running a 32bit linux kernel using an emulator. Whatever the emulation takes up a lot of time, thus the aprox 24Mhz of that chips get reduces down to something in the kilohertz range (10kHz actually).

So, yeah running 64bit software inside a 32bit OS (inside a VM) on whatever hardware will apply a bottleneck. Better install a 64bit OS if you have the hardware.
 

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