Which version does my Windows, 32 bit or 64 bit have?

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Windows 7 or Windows Vista

If you have Windows Vista or Windows 7, there are two ways to determine whether you are working with a 32-bit or 64-bit version. If one of these methods doesn't work, try the other.Method 1: Display the System window in Control Panel

  1. Click Start, type system in the search box, and then click System in the list in Control Panel.
  2. The operating system is displayed as follows:
  3. For a 64-bit version of the respective operating system: 64-bit operating system is displayed under System for the system type.
  4. For a 32-bit version of the respective operating system: 32-bit operating system is displayed under System for the system type.

Method 2: Display the System Information window

  1. Click Start, type system in the search box, and then click System Information in the Programs list.
  2. When System Overview is selected in the Navigation Pane, the operating system is displayed as follows:
  3. For a 64-bit version of the operating system: X64-based PC is displayed under Item for the system type.
  4. For a 32-bit version of the operating system: X86-based PC is displayed under Item for the system type.

 

Windows XP Professional

If you have Windows XP, there are two ways to determine whether you are working with a 32-bit or 64-bit version. If one of these methods doesn't work, try the other.

Method 1: Display the "System Properties" in The Control Panel

  1. Click Start, and then click Run.
  2. Enter sysdm.cpl, and then click OK.
  3. Click the General tab. The operating system is displayed as follows:
  4. For a 64-bit version of the respective operating system: Windows XP Professional x64 Edition <Jahr>version, the system appears under System.</Jahr>
  5. For a 32-bit version of the respective operating system: Windows XP Professional version <Jahr>appears under System.</Jahr>

Method 2: Display the System Information window

  1. Click Start, and then click Run.
  2. Enter winmsd.exe, and then click OK.
  3. If System Overview is selected in the navigation pane, search for processor under Item in the details pane. Make a note of the value.
  4. If the value that corresponds to the processor starts with x86, a 32-bit version of Windows is running on the computer.
  5. If the value that corresponds to the processor starts with ia64 or AMD64, the computer is running a 64-bit version of Windows.

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