All the components except the Intel CPU and NVidia card
are from Apple, and that's why the hardware is more reliable.
However, it's not the main factor of success.
I and my friend who has the old Macbook have done the benchmark test, some kind of competition,
and he won, don't understand why, because the hardware of my computer
is nearly 3-4 times more powerful that his.
Maybe this defeat was because of Vista.
All the new components used at the every new Windows version
were mounted on the old ones from the previous versions,
so, the next upgrades can't change the situation,
the only thing can save Windows is a complete remake,
but that'll bring to the times of DOS.
There's no rescue for Windows,
the future is for Linux (yes, must be United) and Mac OS X.
Think that a lot of Windows users, who can't afford the powerful computer,
will choose to install Linux to their old instead of buying the Mac.