I have numerous worms and viruses on my PC. When i try and install Norton it fails. I get a message saying window's installer is not present and is needed to install Norton.
I have since installed Norton and it still gives me the same message ie that windows installer is required.
Try Spybot, download it here, run it. Also go to www.Lavasoft.com to downloaded Adaware, this should clean up the PC sufficiently to allow installation of Norton.
I use AVG (from download.com , which is free) as my anti-virus program
I used Norton Anti-Virus in the past but have switched away from it the following reasons:
It is resource hungry i.e. slows down your computer
It can be difficult to install
It is even more difficult to fully uninstall - you often need to download a clearn from the Norton site!
It is expensive
You seem to have to buy a new version every year, for little extra features, as far as I can see. I know there is an upgrade price (for around 2/3 of the price), but this is still a lot of money.
If you buy a specific version e.g. NAV 2005, it expires after a year. You don't even get virus definition updates (after the year is past) until you pay more money. I think that for example, you should still be entitled to free virus database updates, as you did pay good money for the product. You should only need to upgrade if compelling new features are included in the new version.
I have had no issues with Avast!.
And did I mention that it was free?
BTW I had similar issues with Norton Utilities - they slow down the computer too much to be useful.
I think you will have to be thorough in uninstalling the original program if decide to ditch it as I tried Avast and it detects other AV programs and warns of a possible conflict.
There is loads of info on possible conflicts (not just with Avast mind you)