Hi, see if it will start in safemode with networking, if so download the Norton uninstaller and run it.
http://service1.symantec.com/Support/tsgeninfo.nsf/docid/2005033108162039

If not download it for him and copy it to the desktop of his computer (use USB stick) then run it.

Most likely a corrupt install or MOST important what previous Anti Virus program did he have and how was that uninstalled. I do not recommend Norton be used ON any home computer instead use free AVG or purchase NOD32, You can also activate the windows firewall, this will give you as much protection as AV's afford and without the poor code that accompanies Norton.

 

I totally agree with Jenae, except for AVG. So many people use it that some hackers make viruses that target AVG, either to bypass it or shut it down completely. Avast suffers from the same problem.

Norton is a very poor anti-virus. In part of my testing I infect a computer with 200 viruses (it's a wonder how the thing even turns on afterwords) and scan it with different AV's. Norton found six, McAfee found eight, AVG found around 80, so did Avast. Kaspersky found about 120, and ESET V4 (Some people call it NOD32) found all 200. Some of the viruses were custom made requiring heuristics to detect.

Norton's also very taxing on your processing power and it's not easy to customize. If it picks up a false detection, there's almost no way to correct it.

I only recommend ESET now. I've never found a better anti-virus or firewall. Start with a free trial, there's simply too many things to say about it to explain (at this hour, anyway). You can find more information at http://www.eset.com/