ROFLMAO
I'm proud of those linux guys.
When you consider the price Microsoft wants for Windows any PC sold for $100
including the OS is going to
have to be using a free OS. The only free OS's that I can think of offhand are : Linux (many variants from PDA OS to Supercomputer OS), BSD Unix (several variants), GNU Hurd, FreeDOS, Minix. The only ones that I think could do the job are Linux and BSD Unix.
I can only assume that Ballmer meant $100
before the OS price was inlcuded. Silly him for not making that clear.
Linux is based on the principle of enlightened self interest. The authors each want more than they can individually create. By putting what they have created out freely available they each get to use the work of all the others. Thus each by giving gains more than they give. This includes corporations. With Linux corporations your competitor is also your ally.
Microsoft is based on money, power and control. You only get what
they decide you paid for. If you use it in any way that they disagree with then you are called a criminal. Afterall you
don't own that software you are merely licensed to use it. When Microsoft ceases support for Windows XP you will no longer be able to do (legal) reinstalls or major hardware upgrades as the MS operated online validation system will not be available. At that time you will have to buy a new OS whether or not XP still serves your purposes. This may of course entail buying a new computer as the next generation Windows may not run on your current machine.