I began experimenting. I made a shortcut to the Solitaire card game that comes with Windows, put the shortcut on my Web page, clicked on it, and, sure enough, the Solitaire game actually started. At this point, I knew I'd found something unusual. I'd never heard of anything like this. It turns out he was.
Companies run their products through rigorous tests before they are marketed.
I think that the reason this flaw was not caught is that Microsoft never checked it out at this basic level. What I did was something anyone could do inadvertently. The difference is that I recognized it as a major security threat. What Greene had discovered was a flaw in Microsoft's browser, which works with the Windows 95 and Windows NT operating systems. It is also the browser used by millions of subscribers to America Online.