Windows Live Onecare will be a complete system providing a combination of antivirus, anti-spyware and firewall software with backup features and several tune-up tools for Windows PCs.
Available from today, it will cost £27 and cover three computers, while also providing access to a 24 hour helpdesk.
While a cheap alternative to most security suites, there are disgruntled murmurs this should be something provided by Microsoft for free.