Please help! NIS 2012 stopped working!

Hello. Earlier today, my sister was on the computer and a pop-up from Norton came up, saying that there was an error in the program and Norton AutoFix couldn't fix it. I tried looging off and on, but it wouldn't work. So I used Norton Removal Tool to remove the program and then used a folder I had on my desktop that I had used previously that said "Norton Installation Files". I started it up, but usually, it takes close an hour to download, but this time, it only took a matter of minutes to start up again. Anyway, it started up again and it's running, but I noticed that under LiveUpdate, it said that last update was 82 days ago. I used Live Update and downloaded all the current updates. Is this a serious problem and what can I do?? Is there a possibility this'll happen again?? Thanks.