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How to Check if Your Computer Is 64 Bit

This article explains how to determine whether your computer/server is running a 32-bit or 64-bit version of a MS Windows Operating System. Perform the following steps on your computer:
Method 1 of 4:

Checking Windows 7/Vista/Server 2008/R2

  1. How to Check if Your Computer Is 64 Bit Picture 1How to Check if Your Computer Is 64 Bit Picture 1
    Perform the following steps on your computer:
    1. Click on the Start Button.
    2. Type 'System' in the Start Search box
    3. Click "System" in the Programs list.
  2. How to Check if Your Computer Is 64 Bit Picture 2How to Check if Your Computer Is 64 Bit Picture 2
    Read the results. In the "System" window it will state either "32-bit Operating System" or "64-bit Operating System".
Method 2 of 4:

Checking Windows XP/2000/Server 2003

  1. How to Check if Your Computer Is 64 Bit Picture 3How to Check if Your Computer Is 64 Bit Picture 3
    Press the WIN+R keys (Windows key and R). Type the following: sysdm.cpl and click OK.
  2. How to Check if Your Computer Is 64 Bit Picture 4How to Check if Your Computer Is 64 Bit Picture 4
    Click on "System Summary": Under "System Type" it will either state "x86" if a 32-bit version of Windows is installed, or "EM64T" if a 64-bit version of Windows is installed.
Method 3 of 4:

Checking Windows 10

  1. How to Check if Your Computer Is 64 Bit Picture 5How to Check if Your Computer Is 64 Bit Picture 5
    Type in the "Control Panel" search box.
  2. Click "Control Panel". Next, press "System & Security". Press "System" and read the results.
Method 4 of 4:

Checking Mac OS X

  1. How to Check if Your Computer Is 64 Bit Picture 6How to Check if Your Computer Is 64 Bit Picture 6
    Launch Terminal app (see Applications/Utilities)
  2. How to Check if Your Computer Is 64 Bit Picture 7How to Check if Your Computer Is 64 Bit Picture 7
    Type the following: "uname -a" at the prompt.
    1. Note: do not use quotes. These were placed for emphasis. #*Note: ensure to insert the blank space between "uname" and "-a" strings.
  3. How to Check if Your Computer Is 64 Bit Picture 8How to Check if Your Computer Is 64 Bit Picture 8
    Read the text. The terminal will display two lines of text. At the end of the second line, you will find wording such as:
    1. RELEASE_I386 i386 ; the latest "i386" means that you're running 32bits kernel
    2. RELEASE_X86_64 x86_64 ; the latest "x86_64" means that you're running 64bits kernel
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