Microsoft has announced that beginning in July, 2009, the software giant will provide free anti-virus software for users of their XP, Vista and Windows 7 versions of their operating system.
Microsoft currently provides a service called "One Care", which is a subscriber based service for which they charge a fee. That product will end in in July when their new free security product called "Morro" begins distribution.
The new Morro software reportedly protects against spyware, rootkits and trojans. Within a day of Microsoft making the announcement on Tuesday, software vendors McAfee and Symantec saw their stock shares take a dive.