How to know if your are running 32 or 64 bit windows? Look at the environment variables:
Environment Variable \ Program Bitness : PROCESSOR_ARCHITECTURE
32bit Native : x86
64bit Native : AMD64 or IA64
WOW64 : x86
Environment Variable \ Program Bitness :PROCESSOR_ARCHITEW6432
32bit Native : undefined
64bit Native : undefined
WOW64 : AMD64
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