If you do, make sure it's official. It might be a virus. I don't know. If your friend gives you a virus, he isn't your friend then
AnswerWell practically speaking it should be installed on all of the computers that you use. However you don't have to install it on all of your computers. Just remember when you by the license it usually includes protection for 3 computers. Which means if you pay for it only use it with one computer than you are wasting your money. Depending on the number of licenses you buy than that's how many copies of norton antivirus you should install. Example if you buy norton antivirus and it comes with 3 licenses then you should install it on 3 computers.
Norton Antivirus software packages can be downloaded freely from the official Norton website. It should be noted that these are either 30 day trials or are basic packages and may not include certain protections.
email Norton with proof of purchace they should issue you with a new product key
Computer
Software applications, particularly ones like antivirus, should only be downloaded from their manufacturer (Norton). This is important, as fake antivirus programs won't detect themselves as viruses, making it hard to notice that one's been infected. Norton offers the free download from their website.
Pretty much any antivirus will do. I use Avast, but AVG, Panda, and others should do fine. I recommend against Norton/Symantec and McAfee, however, as my customers tend to have a LOT of problems with them. Which is ironic, because they are one of the few that cost money.
Are you talking about Norton Antivirus or the rogue anti-spyware program Antivirus 360? Antivirus 360 is not a good program! You should read here http://www.spyware-techie.com/antivirus-360-removal-guide/ and remove it right away!
Install first,then delete.
It depends on what type of threat you have and you should ask Dave Kaspersky or the Norton anti-virus people try calling them.
You should not, the Norton antivirus Firewall is there for a reason and if you attempt to disable it you will most likely be violating policy which could lead to negative action being taken against you. So don't never try to disable the firewall setting.
It is advisable for you to only install 1 antivirus software in one PC. If you happen to install 2 antivirus software in 1 PC and your system hangs, that is because the system is confused and the antivirus software is fighting for dominance. You should remove one of the antivirus and if you want to change to a different antivirus, you must un-install the previous one.
If you have a antivirus on your computer then you should be able to quarantine it. But, if not then if you go on symtec website or something like the Norton antivirus website then you may be able to find the virus and it will tell you what it is and how they suggest to get rid of it. x