Virus prevents antivirus updating
To learn more about how Smart Screen technology helps you avoid malware, see the Use Internet Explorer Smart Screen Filter section of this article.
Learn about security in Internet Explorer Microsoft Security Essentials helps protects your computer from viruses, spyware, and other unwanted software.
Here are a few tips that can help you avoid downloading software that you don't want: Smart Screen Filter is included in Internet Explorer.
If you attempt to visit a website or download a file that has been reported as unsafe, Smart Screen Filter displays a warning that advises you about the potential dangers and enables you to provide feedback.
To learn more about firewalls, read Firewalls in versions of Windows.