I run this on all my home PCs. I love it. Its unobtrusive, and really does a great job not bogging down my systems during updates and scans. I was really hoping that the 4.0 release would provide support for Windows 8, but it doesn’t appear that is the case for this version. I have a couple Windows 8 PCs and tablets not running any type of protection.
Microsoft Security Essentials provides real-time protection for your home or small business PC that guards against viruses, spyware, and other malicious software.
Download: http://www.microsoft.com/download/en/details.aspx?id=5201
OK…so after downloading and attempting to install this latest rev, it appears that my installed version has been updated at some point already. If this is the case for you, you’ll get this message:

Dwayne Allen: I ran into the same issue with $Form.TopMost = $True not applying when...
roncrumbaker: Great link! Lots of information out there...and yes, there are many v...
Geoff Buckingham: Been trying to get some work done on mine for a long time ... without ...
Clint Huffman: Page file sizing depends on the crash dump setting of the system as we...
TGH: We try our best over at www.techygeekshome.co.uk ! mostly out of our o...