&gt;&quot;cyber-attacks and security vulnerabilities in Microsoft products and services that could reduce revenue or lead to liability&quot; should be at the top of the list.<p>Could you point out any program or OS that could guarantee neither of these? Based on what I have seen all major OSes and programs have these issue regardless of whether it is closed source or open source.<p>Besides how do expect them to quantify such unforeseeable events on their accounting statements?