I have Norton 360 on three PCs: Windows 7 32-bit, Windows 7 64-bit and Windows 10 64-bit. In all three, if I open Norton 360 and click on Settings to disable LiveUpdate for an hour, it works. But if I try to open Settings again, Settings will not open after the first or second time. I must restart my PCs to get Settings open again. This is clearly a BUG. Reinstallation does not help and Norton AutoFix finds no problems. OUgrad
EDIT - This has been a BUG for at least the past year.