Trend Micro has had a hosted security service in its small business Worry-Free portfolio for a couple of years now, aimed typically at companies with 5-100 users, although that limit isn't set in stone. Originally called Business Security Hosted, the latest v3.0 release sees the name changed to Worry-Free Business Security Services (WFBS-Services) and the feature set updated to bring it in line with on-premise Worry-free products. As such, WFBS-Services can protect Windows-based file servers, desktops, and laptops from viruses, phishing, spyware, and other common Internet threats. It can also filter out spam, although only, where users pull down mail using POP3, plus it's possible to protect against threats transmitted via portable USB devices and Wi-Fi networks.