How to determine if your computer is running a 32-bit version or a 64-bit version of the Windows Operating System

Description


The following instructions will help you determine whether you are running a 32-bit or a 64-bit version Windows Operating System.

Summary


Microsoft Windows XP Professional

Method 1

  1. In the Windows Start menu, select Run.
  2. Type cpl, and then click OK.
  3. In the System Properties dialog box, click the General 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: The <Year> variable denotes the release year of the operating system.

Method 2

  1. In the Windows Start menu, select Run.
  2. Type exe, and then click OK.
  3. In the System Information details pane, locate the Processor
  4. Note the value.
  • If Processor value starts with x86, the computer is running a 32-bit version of the Windows operating system.
  • If the Processor value 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. In the Windows Start menu, select
  2. Type cpl, and then click OK.
  3. In the System Properties dialog box, click the General 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. In the Windows Start menu, select Run.
  2. Type exe, and then click OK.
  3. In the System Information details pane, locate the Processor
  4. Note the value.
  • If Processor value starts with x86, the computer is running a 32-bit version of the Windows operating system.
  • If Processor value starts with EM64T or ia64, the computer is running a 64-bit version of the Windows operating system.

Windows 7, Vista, and Server 2008

Method 1

  1. In the Windows Start menu, type system in the Start Search
  2. In the Programs list, select System. 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 2

  1. In the Windows Start menu, type system in the Start Search
  2. In the Programs list, select System Information. 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.

Filed under Technical Tips

Last modified May 15, 2017

Submitted Oct 28, 2009

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