New
#1
Microsoft Security Essentials download (86 and 64)
Download Free MSE (Microsoft Security Essentials) from this link:
Download Microsoft Security Essentials from Official Microsoft Download Center
*SAVE* it to "downloads", do not select run! ... Right click on the download, once completed, right click and choose to run as Administrator. Let MSE update and scan your files.
It should automatically update itself, but if it doesn't, either manually update it or update through Windows Updates.