hard lockup bugs in every major version of the OS that I have used from Windows 95 to 7,
Well, Windows 95 & 98 sure - everything prior too. But I've not seen a lockup bug in Windows since then, and I use the damn thing every day at work. Hell, OS X locks up more than Windows, and I've only ever had that happen when I was doing bad things to the graphics driver while writing openGL code.
those have never been and will never be fixed.
The implication of this statement is that not only do you know what these bugs are, but you are able to reproduce them and are maybe even willing to share the details on them. I'd like to find out what they are, if only to cause my workmate's machines to lock up when they're out getting coffee...