I understand, it is maybe not important for many, but it IS important that software (especially antivirus) can be instantly switched off (unloaded completely). Firstly, as a matter of principle. It is extremely odd(and, unfortunately, popular too) to write software without simple "off" button. As if buying it is yet not enough to have control over it. Or, as if they know better what and when needs to be running on my computer. Secondly, Audio Production Software (and, maybe some other, too) requires not only special computer configuration, but also absolutely no unnecessary processes running . No matter how sad would it be for Eset, you simply DO NOT run antivirus with ProTools or Nuendo, and it is not going to change. But that does not mean that in many cases it would be not useful to have antivirus installed. Simply, you choose one with that "off" button, and check that everything is really "off". If NOD32 had it, I would have probably installed already over 300 of them, that's all the difference - now it is another antivirus, even NOD32 is better. But my question is simply - why "Quit" button only unloads user interface - is it silly programming, or some special very useful feature beyond my understanding?