Without a doubt, Microsoft Security Essentials is one of the best, if no the best, free antivirus software out there for Windows 7. Just like any other antivirus solution out there, even the recently released free Microsoft Security Essentials requires latest virus and spyware definition updates to keep track of malicious items.
In most cases, users don’t need to manually update Microsoft Security Essentials as it automatically downloads updates and an option is also available to check for updates.
Since many of you might have installed MSE on a Windows machine that has no Internet connection to download the latest virus and spyware definition updates, here are the direct download links for the offline updates.
You can download Microsoft Security Essentials updates directly from Microsoft and then install them. Simply run the downloaded update file to update Security Essentials definitions.
To know how to install these updates offline, please follow our how to update Microsoft Security Essentials Offline guide.
Download definitions (for 32-bit Windows)
Download definitions (for 64-bit Windows)