My previous Antivirus was Norton but I am not satisfied with its performance in terms of detecting viruses.So I searched over the internet to find the best Antivirus that I can use. I found out that Microsoft Security Essentials has a good feedback on most forums that I have read. I downloaded and installed MSE successfully it also updates its definitions. But these following days, when I try to update it because I saw the last update was a week ago, it displayed an update error (refer to the image below). Why do I get this error although I have a fast internet connection?
      
"Virus and spyware definitions update failed
Security Essentials could not check for virus and spyware definition updates
due to an Internet or network connectivity issue.
Click help for more information about this problem"
Update failed on Microsoft Security Essentials.
Microsoft Security Essentials do not update itself through schedule. The MSE only checks for updates once a day or everytime a computer boots or if it checks that the updates are newest from the current definitions. If those are met, then the Microsoft Security Essentials will connect to Microsoft server for Anti malicious software download updates.
To make sure that your MSE gets the updates that it needs, follow the steps below.
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The Automatic Update service and Background Intelligent Transfer Service must be running on your computer. Access the Services through the Control Panel>Administrative Tools.
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Check the proxy setting if you are connected via proxy.
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Have the MSE to check if there are new updates before doing any Scan. The simple trick is to schedule a san via MSE settings and force it to check new updates before it scans your computer.
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Download and Install MSE definition Updates by using the engine and definition package that you can get for free from the Microsoft Malware Protection Center.
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Repeat the Manual Update of MSE a few times to be able to connect to Microsoft Malware Server. Possibly you are having a problem with your internet connection.
Update failed on Microsoft Security Essentials.
The main cause of this problem is that there are conflicts in your Microsoft Internet Explorer Settings, there should be enough solutions to this.
Solution 1:
– You must close all your open programs including Internet Explorer.
– Click in Start and type the Search box "inetcpl.cpl" and press Enter.
– Click the Advanced tab in the Internet Properties dialog box.
– There should be a Reset button under the Reset Internet Explorer settings, click it and then click Reset again.
– Wait until the program finished resetting its settings then Click OK.
– Go to Start or in your Desktop and then Open Internet Explorer.
– Go to Start and type in the Search box "Microsoft Security Essentials, go to Update tab and click update, it should fix your problem by now and if the issue persists, go on to the next step.
Solution 2:
– You must close all your open programs including Internet Explorer.
– Click in Start and type the Search box "inetcpl.cpl" and press Enter.
– Click the Programs tab in the Internet Properties dialog box.
– There should be a Make Default button under the Default web browser, click it and then click OK.
– Go to Start and type in the search box "Microsoft Security Essentials", go to Update tab and click update, it should fix your problem by now and if the issue persists go on to the next step.
Solution 3:
– If the steps did not help you with the issue, Contact Support.
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