Infection
Hi Blues & Two's,
Trash Norton and install NOD32 also Microsoft's very good "Security Essentials". However this kind of infection comes from visiting infected sites and the security suite may not pick it up. The first thing that happens, as you have seen is that things are disabled. Another favourite way of infection is from an infected memory stick.
You may have been lucky with the restore because the last restore point was made before the infection occurred. Often the restore will restore everything including the virus.
Good luck - Nedrover