How to Check if Windows Vista, XP and 2003 System Is 32-bit or 64-bit (x86 or x64) Version

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 appears under System.
*For a 32-bit version operating system: Microsoft Windows XP Professional Version appears under System.
Note 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.


Microsoft Windows Server 2003

Method 1

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 Server 2003 Enterprise x64 Edition appears under System.
*For a 32-bit version operating system: Microsoft Windows Server 2003 Enterprise Edition appears under System.
Method 2

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 EM64T or ia64, the computer is running a 64-bit version of the Windows operating system.


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”.