Dealing with Nssstub.exe
Last week there was an Adobe Shockwave update and during the update download I missed the bit where you untick the selection for Norton Scan and so the Nssstub.exe came with the update download.
I dont know why this comes selected especially when it can be difficult to remove. I think users must opt in if they think they want the Norton scan for some reason.
I first went to the Symantec website on instructions on how to remove it but the simple steps given there did not work.
Also the Nssstub.exe was not available in the Control Panel as stated on the Symantec website.
Finally the way I removed it was to delete the task from C:\Windows\Tasks and then after that I deleted the NSSStub.exe from the C:\Windows\System32\Adobe\Shockwave 11\ folder.
I got the location of the NSSStub.exe after searching the registry but in my case I didn't have to make any registry changes.
I didn't like the behaviour of NSSStub.exe especially as at times I couldn't even use the machine but now it looks all good.