How To Check If Computer Is Running A 32 Bit or 64 Bit Operating System in Registry

1.HKLM\HARDWARE\DESCRIPTION\System\CentralProcessor\0


Identifier         REG_SZ                     x86 Family 6 Model 14 Stepping 12
Platform ID    REG_DWORD          0x00000020(32)

2. HKLM\SYSTEM\CurrentCongtrolSet\Control\Session Manager\Envirornment

PROCESSOR_ARCHITECTURE   REG_SZ         x86

3.HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion 

 BuildLabEx  REG_SZ 7600.16695.x86fre.win7_gdr.101026-1503