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I have an Acer Extensa 4220 laptop and want to re-install the OS. I do not have the original DVD and I already have the key.<br />
<br />
Where can I download the OS? In Microsoft's website one has to buy another key in order to re-install the OS. I do not want to do that.<br />
<br />
Thanks.
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I have an Acer Extensa 4220 laptop and want to re-install the OS. I do not have the original DVD and I already have the key.

Where can I download the OS? In Microsoft's website one has to buy another key in order to re-install the OS. I do not want to do that.

Thanks.

Windows Vista Re-Installation

Windows Vista is an operating system created by Microsoft as the successor to Windows XP. It was intended for PCs, workstations and laptops, and shares the same code base as its successor, Windows 7. New features included an updated graphical user interface (GUI) and visual style dubbed Aero, a new search component called Windows Search, redesigned networking, audio, print and display subsystems, and new multimedia tools. Vista aimed to increase the level of communication between machines on a home network, using peer-to-peer technology to simplify sharing files and media between computers and devices. Windows Vista included version 3.0 of the .NET Framework, allowing software developers to write applications without traditional Windows APIs.

Windows Vista

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.