[Tutorial] Check Operation System Base Type (32bit / 64bit)

Method

1. Click Start, then click on Run or Start Search.
2. Type msinfo32.exe and then press Enter key.
3. In “System Information”, review the value for the System Type item:

• For 32-bit editions of Windows, the value of the System Type item is x86-based PC.
• For 64-bit editions of Windows, the value of the System Type item is x64-based PC.

reference : http://forums.techarena.in/tips-tweaks/962178.htm