Record company Sony BMG Music Entertainment has been targeted in a class-action lawsuit in California by consumers claiming their computers have been harmed by anti-piracy software on some Sony BMG CDs. The claim states that Sony BMG failed to disclose the true nature of the digital rights management system it uses on its CDs and thousands of computer users have unknowingly infected their computers, according to court documents. The suit, filed Nov. 1 in Los Angeles Superior Court asks the court to stop Sony BMG from selling additional CDs protected by the anti-piracy software and seeks monetary damages for California consumers who purchased them.