Not all of them do, you need to make sure that it comes with Windows 7.
Macs do not come windows ,only PC's come windows so no a macbook does not have windows 7. However, I heard that Macs can run Windows as smoothly as a PC so you could probably buy windows for it.
buy a new PC with vista on :-)
It might make sense to wait for the next version of Windows to come out, some time in 2012 or 2013.
No, games for windows can only be played on a windows PC. It might be possible to buy the 360 version of a PC game though.
The general answer for the question is yes. It surely depends on where you buy the computer. Many big markets have already installed a Windows Vista version on their PCs as they sell them. But some of the smaller shops, especially those that build your personal PC individully for you often let you decide whether you want to have Windows Vista or XP or even other systems like Mac or Linux. There is also a chance for you buying a computer with no system at all so that you can decide what to install.
you can not degrade.. you have to do new installation
You can Just buy the Final Fantasy VIII game for PC for windows 95 or windows 98 and get an old PC with those operating systems. Otherwise the reason is that the game is too old to run on the windows operating system in your PC
Yes, but you would have to buy a DVD/CD of a version of Windows to install it, so it would cost money.
Your pc is most likely running on an out-of-date version of Windows. Try looking for Windows requirements on the new software you just purchased, and you will see which Windows system your pc needs to be running on to be able to handle your new software.
you need an xbox
You'll buy PC games. The XBox controller can be used with some PC games as a standard video game controller.
A new PC does come with a backup program through the properties tab. Additional information of what you would like backed up may need to be entered. There are additional more detailed backup software that can be bought through an outside source.