Windows Vista is a software so it cannot have a physical microphone built in but:
It is true that Vista has already included drivers for majority of microphones so if you plug in any, it should work. But I personally advise you to check before you buy one.
Windows defender
Windows Vista games can be purchased right on your computer start menu. Windows Vista comes with its games built into the computer, more information is available online.
Vista is software (a program) ... a graphics card is hardware.
Yes, you can.
Only Windows Vista Business, Enterprise and Ultimate editions have this feature built into the operating system.
That edition of Windows Vista does not exist. Windows Vista exists in two editions for home users: Windows Vista Home Basic and Windows Vista Home Premium.
Only the psp 3000 has a built in mic
All laptops purchased with Windows included have "built-in" drivers with them. The manufacturer places any necessary drivers on the installation disc or image. This does not mean that a retail copy of Windows Vista will install and have all hardware working out of the box.
Windows 7 will be the best choice for a laptop computer. Vista is the older Microsoft operating system, and has more bugs and unsupported features built in.
No your windows 7 will not deleted
No. Obviously, if you upgrade to Windows Vista, you will have Windows Vista.
No.