How to check if your System is a 32 bit or 64 bit. Follow these instructions:
Windows Vista

Method 1

  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.

Method 2

  1. Click Start, type system in the “Start Search” box, and then click system in the “Programs” list.
  2. The operating system appears as follows:
    • For a 64-bit version operating system: 64-bit Operating System appears for the “System type” under “System”.
    • For a 32-bit version operating system: 32-bit Operating System appears for the “System type” under “System”.

Method 3

  1. Click Start, type system in the “Start Search” box, and then click System Information in the “Programs” list.
  2. The operating system appears as follows:
    • For a 64-bit version operating system: x64-based PC appears for the “System type” under “Item”.
    • For a 32-bit version operating system: x86-based PC appears for the “System type” under “Item”.

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Microsoft Windows XP Professional

Method 1

  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.

Method 2

  1. Click Start, click Run, type sysdm.cpl, and then click OK.
  2. Click the General tab. The operating system appears as follows:
    • For a 64-bit version operating system: Microsoft Windows XP Professional x64 Edition Version <Year> appears under System.
    • For a 32-bit version operating system: Microsoft Windows XP Professional Version <Year> appears under System.

    Note <Year> is a placeholder for a year.

Method 3

  1. Click Start, click Run, type winmsd.exe, and then click OK.
  2. In the details pane, locate Processor under Item. Note the value.
    • If the value that corresponds to Processor starts with x86, the computer is running a 32-bit version of the Windows operating system.
    • If the value that corresponds to Processor starts with ia64 or AMD64, the computer is running a 64-bit version of the Windows operating system.

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