Norton blocking own program files?

I'm getting a firewall blocked message that Windows\Explorer.exe and Windows\System32\Svchost.exe and Program Files\Internet Explorer\Iexplore.exe are trying to access (by open file)

Documents and Settings\All Users\Application Data\Norton\{0C55C096-0F1D-4F28-AAA2-85EF591126E7}\NIS_18.1.0.37\symnetdrv\COMCtrl.dat

 

Is this the work of a virus?

 

Thanks