How to Configure Norton Anti Virus Through the Options Dialog Box
Copying the Selections here are your best bet. Scanning
memory, boot and master boot records, all files and compressed files is
a MUST. Always check "ALL FILE" and "COMPRESSED FILES."
This way, EVERY file on your computer is scanned. Viruses can be written
for almost any kind of file be it excecutable, text / document, graphic
programs [Corel Draw, JPEG's / Gifs] and more.