Oh, and to answer your second question, I haven't quite understood why you can't use a CD-ROM to install Norton Anti-Virus. You need to get the installation files onto your PC somehow.
If you don't have a working CD-ROM drive, you might be able to use a ZIP drive or a USB key if you can borrow the installation files from someone else (assuming you have a legitimate licence for the software of course!). Alternatively, you can buy a copy online and download it from
http://www.symantec.com.
Might be cheaper and a lot easier to pay Symantec tech support to help you out.