With Windows Vista Service pack 2, my up to date Norton IS uses 100% of the CPU until I switch on silent mode. It stays at 100% for many hours, and shows no signs of ever finishing what ever it is doing so long as silent mode is not activated.
Is there any remedy for this unacceptable computer loading?
One suspicious symptom is the "token access" conflict with the Windows TASKMGR.EXE, shown from below. An enormous stream of these warnings spaced by about 1 second occur when the Windows Task Manager is open.
02.10.2014 21:53:16,Mittel,Nicht autorisierter Zugriff blockiert (Prozess-Token öffnen),Blockiert,Keine Aktion erforderlich,02.10.2014 21:53:16,C:\WINDOWS\SYSTEM32\TASKMGR.EXE,3920,C:\Program Files\Norton Internet Security\Engine\21.6.0.32\nis.exe,4588,Prozess-Token öffnen,Nicht autorisierter Zugriff blockiert,1