Norton causes Blue Screens

We have a lot of customers with the Norton Security multi User License. Since last week we have some blue screens at some pc´s. The Situation is getting worse. Until now we have 4 differnt custumers (with differnt number of pc´s) who have all the same problem. They all get blue screens with the same report:

IMPERSONATING_WORKER_THREAD - 0x000000df - ntoskrnl.exe

If we deactiivate auto protect the pc´s are running stable. Das anyone have the same experience at this time?