Windows has Defender and apparently soon an antivirus app to accompany it. Whether it will perform as well as the others of its ilk remains to be seen.

Microsoft Corp is getting ready to unveil a long-anticipated free anti-virus service for personal computers that will compete with products sold by Symantec Corp and McAfee Inc.

A Microsoft spokesman said on Wednesday that the world's biggest software maker is testing an early version of the product with its own employees. Microsoft would “soon” make a trial version, or product beta, available via its website, he added, but declined to provide a specific date.