most will
YES
In simple terms, 32-bit operating systems can only be able to run on 32-bit CPUs and 32-bit apps, but a 64-bit operating system can be able to run both 32-bit and 64-bit CPUs and apps.
Generally speaking, no. The opposite is, however, possible.
There are two versions, one for 32 and second for 64 bit. If your version is for 32 bit, it will not work in 64 bit computer.
You simply run the 32 bit installer. Nothing more than that.
32 bit applications will work on 64-bit but they will not run as efficient as 64-bit application. the reason for this is the 64-bit uses the memory better than a 32-bit. this is why a 32-bit can only use up to 3 gigs of ram and a 64-bit can use 16 gigs +
Yes.
fat32, 32 bit, 64 bit
A design of computer with a bus width of 32.
Leopard is 64-bit, but still natively supports 32-bit apps side-by-side.
cant
Switching from 64-bit Windows to 32-bit would require purchasing and installing another copy of Windows. This is generally not necessary, anyway, since the 64-bit version can run 32-bit apps just fine.