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1. 1Perform the following steps on your computer:
   • Click on the Start Button.
   • Type ‘System’ in the Start Search box
   • Click “System” in the Programs list.
2. 2Read the results. In the “System” window it will state either “32-bit Operating System” or “64-bit Operating System”.

Method2

Checking Windows XP/2000/Server 2003

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1. 1Press the WIN+R keys (Windows key and R). Type the following: sysdm.cpl and click OK.
2. 2Click 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.

Method3

Checking Windows 10

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1. 1Type in the “Control Panel” search box.
2. 2Click “Control Panel”. Next, press “System & Security”. Press “System” and read the results.

Method4

Checking Windows 11

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1. 1Open Windows Settings page. Open Windows Settings by pressing Win+I on the keyboard and the System page will be shown at first by default.
2. 2Choose and view About. Scroll down to About at the bottom of System. Click on it so you can view the information in System type.

Method5

Checking Mac OS X

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1. 1Launch Terminal app (see Applications/Utilities)
2. 2Type the following: “uname -a” at the prompt.
   • Note: do not use quotes. These were placed for emphasis.
   • Note: ensure to insert the blank space between “uname” and “-a” strings.
3. 3Read 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