Dr Seven--
then it turns Norton back on.
Neither dunedin nor I suggested you turn Norton off. Neither did we suggest you turn AutoProtect off.
The advice was to uncheck the box labelled "Turn protection on for my Symantec product." in the Miscellaneous window.
Does using System Restore put the check back into that box?
Turning Norton off and/or turning Autoprotect off are entirely separate matters from checking or unchecking that box in the Miscellaneous window.

AutoProtect settings are in the AutoProtect window. Do not uncheck the box in that window that says "Turn AutoProtect on (recommended)"
If you still are having problems what do the error messages you getting say?
Does System Restore work now?
It is easy to get confused by Symantec's language.