Please disable these too
Symantec Settings Manager
symantec endpoint protection
symantec management client.
System Event Notification
Symantec Event Manager
please use wholockme to know which process is holding it
most of the times it will be rtvscan.exe
on these do u have mutiple symantec product, say like mail security , ghost, etc
coz all the symantec products put there virus defs in this same path...
hope they are not holding the defs