Lenovo ThinkPad T520, Win7-64bit...
NIS-2012 ran OK for many months, with Live Update every day.
Ran Live Update on 2012-05-17 and NIS disappeared from tray! Would not open from Start menu.
Norton sensed a problem and ran a repair tool. However, it did not fix the problem...still no NIS-2012.
After looking for solutions at support site, I decided to use Norton's Uninstall-Reinstall tool for a fresh start. NIS-2012 returned.
A day later I figured Norton would have fixed the problem (duh!) and ran Live Update again. Of course NIS-2012 disappeared.
Another Uninstall-Reinstall brought it back again. How can we tell when NIS-2012 Live Update will be safe to run again?