If you really want to protect your PC you will have to find a better security program than Norton. I have removed so many infections from friends and families computers who were using Norton Anti-virus, and I really do have to wonder if that program even works at all.
AVG is a far better program, and even the free edition of AVG will do a far better job of protecting your PC than Norton ever will, and the free edition of AVG will actually keep infections out of your PC unlike the paid version of Norton, and everyone that I have set up with AVG has really been satisfied with how it performs, and I use it myself because I have not found any program that does the job better.
You might also want to install an anti-mal-ware program as well, and mal-ware is different from viruses and other infections, and your anti-virus program will not detect mal-ware, and the best program that I have found for that is Malwarebytes, and even the free edition of that program will work very well and it will do what it claims to do, get rid of mal-ware on your PC and Malwarebytes does that job very well.
Here are the links if you would like to try them out, and they will certainly purge the infections and mal-ware from your PC, and they are free programs so you really have nothing to loose, but you will have a lot to gain in PC security. If it were my PC, or someones infected PC that I was working on, I would delete Norton from the PC and I would install the AVG and the Malwarebytes.
If installing these programs pay attention to the installation because you have the option not to install any toolbars into your browser that you do not want or need, like a google or yahoo toolbar, and if you do not want them or need them then just un-check the boxes when they come up on the installation screen and it is not difficult to do at all.
Answers & Comments
If you really want to protect your PC you will have to find a better security program than Norton. I have removed so many infections from friends and families computers who were using Norton Anti-virus, and I really do have to wonder if that program even works at all.
AVG is a far better program, and even the free edition of AVG will do a far better job of protecting your PC than Norton ever will, and the free edition of AVG will actually keep infections out of your PC unlike the paid version of Norton, and everyone that I have set up with AVG has really been satisfied with how it performs, and I use it myself because I have not found any program that does the job better.
You might also want to install an anti-mal-ware program as well, and mal-ware is different from viruses and other infections, and your anti-virus program will not detect mal-ware, and the best program that I have found for that is Malwarebytes, and even the free edition of that program will work very well and it will do what it claims to do, get rid of mal-ware on your PC and Malwarebytes does that job very well.
Here are the links if you would like to try them out, and they will certainly purge the infections and mal-ware from your PC, and they are free programs so you really have nothing to loose, but you will have a lot to gain in PC security. If it were my PC, or someones infected PC that I was working on, I would delete Norton from the PC and I would install the AVG and the Malwarebytes.
If installing these programs pay attention to the installation because you have the option not to install any toolbars into your browser that you do not want or need, like a google or yahoo toolbar, and if you do not want them or need them then just un-check the boxes when they come up on the installation screen and it is not difficult to do at all.
AVG;
http://download.cnet.com/AVG-Anti-Virus-Free-Edition/3000-2239_4-10320142.html?tag=mncol
MalwareBytes;
http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?tag=mncol