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Chinese officials no longer approve the use of the two antivirus software vendors, according to reports.
Security software maker says it paid nothing and there were no settlement agreement with the patent assertion entity, commonly known as a patent troll.
A new antivirus update from Kaspersky disables Internet connectivity, forcing the company to push out a fix and a workaround.
The operating system is meant to protect industrial systems from cyberattack by preventing any third-party code from executing.
Kaspersky Lab and its partners say at least one of the new malware strains is still operating in the wild, and claim to have traced the campaign back to 2006.
Kaspersky Internet Security 2013 creates a virtual Fort Knox around your online financial transactions, while debuting a new exploit blocking engine. See what's new in this video.
The security company says it analyzed Mac OS X vulnerabilities and new forms of malware on its own initiative, but that "Apple is open to collaborating with us."
Symantec's widely used and much maligned line of Norton security suites will get a major overhaul in September.
Chinese antitrust regulators also raided the offices of IT firm Accenture, one of the software giant's consulting partners.
In an interview, the security firm's CEO says Apple has a lot more malware coming its way, and that it's not putting enough resources into protecting users.