Go into your disk manager and delete the windows partition then expand the mac one.
http://osxdaily.com/2009/11/20/resize-partitions-in-mac-os-x-with-disk-utility/
If you don't have Movies and only a few games, I would probably drop the hdd all together.
How much space is used on the current computer?
A modern i5 will be plenty.
Lol ^^^
Kind of surprising actually...
Considering many estimates still say they just ditched 30% of their user base.
Its not like they have anything to gain by users upgrading like MS.
Just throwing this out there...
If the computer (and its backup) fail in a modern airplane,
Your going to die regardless of weather or not the pilot can see the crash.
A window isn't going to do the pilot much good if his controls aren't working...
http://en.wikipedia.org/wiki/Fly-by-wire