Microsoft will be releasing its free anti-virus software Morro on 23rd June. It is expected that big players like symantec and McAfee will have a hard time competing with the free software. Microsoft claims that Morro will be light on the system resources. This will make old PC owners/McAfee and Norton users happy.

“Morro will be able to provide the essential protections that consumers need without overusing system resources, and will help more consumers have better protection against online threats.”  -   Microsoft

The detailed fact sheet and the expected features at [Gizmodo] and [Lifehacker]