Download Microsoft Security Essentials

Please click on your corresponding Operating System to download. (If unsure, please see directions below.)

• Windows XP 32-bit
• Windows Vista/Windows 7 32-bit
• Windows Vista/Windows 7 64-bit

How to tell what Operating System you have:

• Click the Start button, then Click Run.
• In the box, type winver, and then Click OK.
• If you have no Run button, then Click the Start button and in the
search programs and files box, type winver, and then press Enter on your keyboard.

How to tell if you are running a 32-bit or 64-bit Operating System:

Method 1:

• Click the Start button.
• Right-click on Computer and then left-click on Properties.
• Under System, look for System Type.

Method 2:

• Click the Start button.
• Click on Control Panel.
• Click on System and Maintenance. (If not present, skip to Step 4.)
• Click System.
• Under System, look for System Type.