The award winning free Anti-Virus software from Microsoft is available free to download for small businesses from early October. To help small businesses to protect their PCs, Microsoft is making Microsoft Security Essentials available for small business on up to 10 PCs for Free.
Microsoft intended to to help these companies save money and grow their business by offering no-cost protection from viruses, spyware and other malicious threats.
It gives you best free real-time protection against viruses, spyware, and other malicious software. It runs quietly and efficiently in background using limited system resources. So you can use it on netbooks and old computers with out any difficulties.