Its a valid question, for you to ask, I understand the confusion. You
can install 32 bit Windows on a 64 bit machine, however, it doesn't work the
other way around.
The big difference is the amount of address space in a 64 bit operating
system. The storage limitations are pushed higher (meaning larger hard
drives), 64-bit Windows can access more than 3GB of RAM per process
(application), and the hardware can support much larger drives. The
limitations of what can be done with the software are also decreased.
Applications that are most affected by this are server applications like
databases and web servers that need large amounts of memory to increase the
concurrent load they can handle. Also video games, graphics and other math
intensive programs benefit from this because of the increased scale of the
numbers that can be manipulated, so the math can be more precise and carried
out to much greater scale.
Basically, if you are asking about whether you should install 64 bit
Windows on your computer, you should probably just install 32 bit, or ask a
friend or local professional if they can install it for you. You are
probably not going to get a correct answer for your hardware configuration
by asking online. Not to mention, having someone do it for you or explain it
to you in person is going to benefit you, because you can ask questions in