For a long, long time now, I've run the Symantec anti-virus program (corporate edition) on my home desktop computer. I got the original binary from college and I've kept it ever since, undoubtedly breaking the license agreement in the process. Over the Thanksgiving holiday, however, I ditched the bloated, slow Symantec mess for the newer, freely available Microsoft Security Essentials (MSE). Having read good things about the product, I figured I'd give it a try.
So far, so good. Boot times are noticeably faster, which is a big plus in my book. With Symantec, my boot times had become horrible; it would literally take 2 or 3 minutes for the machine to become usable. Now, it's ready in about a minute or a minute and a half (still too long, in my opinion; maybe Windows 7 will fix that). MSE is also quite easy to use. The interface is intuitive, and updating happens auto-magically, with no need to schedule updates. Performing a quick scan took a little while, but seemed to run faster than Symantec did. To top it all off, the MSE memory footprint is much smaller, though it's still one of the larger memory using apps on my system.
What do you guys use for anti-virus solutions? I'm pleased that Microsoft is offering a quality solution to this problem. And the price couldn't be better.