Unauthorized access blocked

Norton 360  version 4.3.0.5

Windows XP service pack 3

 

Im getting messages that an unauthorized access has been blocked

 

the actor:  C:\windows\system32\misexec.exe

 

target:  c:\programvfiles\norton 360\engine\4.3.0.5\ccsvchst.exe

 

just wondering what was going on.  an attack or norton problem?

 

thanks

pdl2