I've used NIS on my XP PC for some years without any problems. Two months ago I was offered a free update to NIS2013 by Symantec. After numerous attempts to install it never worked. I did four separate LiveChats with Symantec Support where they repeated the uninstall and reinstall. Didn't work. Then I saw the problems others reported on this forum about problems with NIS 2013, so I went back to NIS 2012 and its been fine.
Now my licence runs out in a month and I'm wondering if the bugs in NIS 2013 have been fixed, or is it still a work in progress?