I thought MSE was free anyway...?

it most probably says somewhere in the EULA: "for personal use only" or something similar,
which would explain the "News" for small businesses...


i found this after some research:
"Originally released last year for single-PC use at home, Microsoft Security Essentials was designed as a comprehensive security solution in a lightweight package. Smith says a growing chorus of requests prompted Microsoft to extend the service to small businesses.
“When we launched Microsoft Security Essentials last year, small businesses kept telling us that it was exactly the type of thing they need at work too,” says Smith. “What they really wanted from their antivirus software — inexpensive, quiet protection from a provider they can trust — were all things Microsoft Security Essentials could clearly deliver.”
"
Free Microsoft Security Essentials Coming for Small Businesses: Award-winning virus and malware protection available for both home and work.


it was as i remembered: "single-PC use at home"...


EDIT: added new info !

Yes, a lot of free software that is out there is only free for personal use. When you want to use them in a commercial business to generate revenue or profit, you have to pay for them.

Great! I rather like MSE. It's lightweight, and does a good job. The only real downfall I have of this, is that it brings it more into the spotlight. Which makes it more vulnerable to attacks.