Another reason is that 32-bit software can run on 64 bit systems because of the WOW64 (x86 emulator) built into the 64bit system, which makes it flexible between 64 bit systems and 32bit systems to run 32bit software.
However, some software, such as window drivers, Dedicated anti-virus software, does not work on 64 bit systems.
Some people say that your processor is 32 bit, so you want to use 64 bit. If you want to use 64 bit, you need to have a CPU that is compatible with 64 bit. Some people want to know if your machine is compatible with Windows 64 bit. First of all, if you want to know the bit system of your machine, you can look through my computer … system properties, then you can know if your OS is 32 bit / 64 bit. Also, if you want to know if your machine is capable of 64 bit.