
The program checked for (and found) updates even before the installer had finished. Microsoft Security Essentials actually works well with many other programs, but the installer advises removing your existing antivirus software, if any.

We tried Microsoft Security Essentials for 64-bit Windows.

If you're in the market for a capable antivirus, firewall, and Internet security solution for Windows, would you consider one that consistently ranks at or near the top in tests against the big names in antivirus protection? A lightweight app that's frugal with system resources? One that offers timely, automatic updates, an effective firewall that integrates with Windows, and user-friendly operation that's mostly in the background? Suppose we added the fact that it's free and that you might even have it already, and if not, it's a few clicks away? Sounds great! What is it? Microsoft Security Essentials, that's what - one of the best-kept secrets in Windows software.
