How to change 32-bit Win7 to 64-bit Win7 (master trick)

Now everyone is using Win7 system, not 32-bit or 64-bit, of course, not the pro who study the computer, certainly do not know, the difference between 32-bit and 64-bit. In fact, if the computer's memory is relatively large, just replace the 64-bit Win7, you can help the computer improve performance, then how is this replaced?
Win 7

A lot of friends who don't know much about computer systems think that 32-bit is changed to 64-bit, just a digital change, as long as the 32 in the system is changed to 64.

This view seems ridiculous, but as a newcomer to the computer, many questions are very simple. In fact, the difference between 32-bit and 64-bit systems is not only the change of numbers, but the difference of the kernel. .

Therefore, if you want to replace 32-bit win7 with 64-bit win7, you need to reinstall the operating system, just like replacing xp with win7 is the same reason.

So I want to change my computer to 64-bit Win 7, in fact, I changed my system to a computer, not the 32 inside is replaced by the number 64, but if the computer does not Any major operation friend, you don't have to think about 64-bit.