But the Justice Department and the FBI want Congress to pass a quite different bill, one, which would make it easier for them secretly to gain access to suspects' computers in their homes, to gather passwords, to install "recovery devices" and to disable encryption and security software.

BBC: Paul Reynolds, BBC Washington Correspondent

Russian IT security company Kaspersky Labs told users to disable its anti-virus software or roll back the update.

BBC: Kaspersky anti-virus cuts web access of thousands of PCs