Microsoft Security Essentials : When i try to update virus and spyware difinitions i get this__message:

virus and spyware definitions status connection failed Security Essentials could not complete the virus and spyware definition update on 1/27/11 due to an Internet or network connectivity issue. click help for more information about this problem. 

my last updates ended on dec 31/2010  


“Connection failed” message also occursbecause of incorrect internet proxy settings so follows the steps mentioned below to reset the proxy settings.

1. Click onVista Start Button

2. Go toAll Programs -> Accessories

3. Now right click onCommand Prompt and select “Run as Administrator” from context menu.

4. This should bringelevated command prompt mode with full Administrators rights.

5. Now in the Command prompt (Black Screen) Typethe following:


(Note: There are three spaces in the entire command which is important)

7. Press the ENTER keyon your keyboard.

8. Close the CMDand Restart the computer

9. Try to update Microsoft Security Essentials.


If the update still fails download the MSE updates from the following link and install. 32-bit computer 64-bit computer


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Last updated January 9, 2020 Views 12,591 Applies to: