more and more Samples of daily Malware , Fake AV , Fake Codec ect.have Rootkits inside that can disabled Norton 2009 after Reboot that infected Machines !
http://www.abload.de/img/1xxw1k2.jpg
http://www.abload.de/img/15lj6.jpg
http://www.abload.de/img/19i5j.jpg
Combofix http://www.combofix.org/ show that Rootkit infection on my Testmachines with NIS2009 that i have infected with Malware to look for Detections.
Symantec should address the issue with urgently investigations.