From a programming perspective, I'm not sure, but you would most likely need to rewride code and use a 64-bit compiler.
From a user perspective, you can not. However, Windows 7 x64 will run x86 programs on it x86 subsystem.
Although both 64 bit and 32 bit software programs perform similarly, 64 bit programs can handle bigger files much more efficiently than 32 bit programs.
64 or 32 although the 64 will be able to run 32 bit programs.
You mean 32-bit and 64-bit, not 32 byte and 64 byte. A byte is an aggregate of (usually) 8 bits. 32-bit programs will execute in a 64-bit environment without any modification. 64-bit programs can also execute in a 32-bit environment, but this requires emulation through a 64-bit virtual machine.
Programs written for 32-bit operating systems will run perfectly well on a 64-bit system.
Yes.
Actually, they both make what are known as x86-64 processors, which are processors that can run both 32-bit and 64-bit programs. Check the specifications of the processor for something like "64-bit" or "64-bit Ready" to make sure you can run both x86 (32-bit) or x64 (64-bit) programs!
A 32 bit processor has 32 bit wide data bus while a 64 bit has 64 bit wide data bus. Address bus may or may not be 32 bit or 64 bit wide in the respective processors. To fully utilise the 64 bit data bus the programs must be written in such a way that they can use 64 bit wide data bus. A 64 bit processor can also act as 32 bit.
There is not much difference between Office 32 and Office 64 bit programs in terms of performance. However, Office 64 has a larger memory and stores more data.
There are different versions of Vista as well as 32-bit and 64-bit for each. To switch from 32-bit to 64-bit you would have to make sure that you have 64-bit compatible hardware and would have to purchase a 64-bit version of Vista.
/Programs Files (x86) Folder
It can do but it is really the other way around. A 32-bit operating system can work with a 64-bit processor. However, if the processor doesn't have a "soft" switching mode, you will have to manually switch the 64-bit processor to 32-bit mode via the CMOS setup. Ideally you should install a 64-bit operating system and leave the processor in 64-bit mode. This will then allow you to run 32-bit programs and 64-bit programs side-by-side.
64 bit computers process data in larger chunks than 32 bit computers. This means a number of things, but the big 2 are: 1) When programs are written to support 64-bit processors, those programs will generally perform faster than on a 32-bit processor of the same speed. This is partially because 32-bit computers must handle 64-bit numbers in two steps, whereas 64-bit computers only need to use one step. 2) 64-bit processors can address more memory than 32-bit processors. This means your server can have more RAM, and therefore can store more data in memory, making memory-intensive programs like databases faster.