To help prevent software piracy, Microsoft requires that Windows 8 is activated before it can be used. All infobandarpkr.comhường. & Compaq computers & tablets that come with Windows 8 installed activates automatically once connected to the Internet, khổng lồ make it easier for you khổng lồ set up your computer. However, if you decide to install a different version of Windows 8 (such as an nâng cấp to lớn the Enterprise version) or a store-bought copy of Windows 8, you need to lớn activate Windows as part of the installation process. There also might be situations when Windows prompts you to lớn activate the sản phẩm, even though the product has already been activated.

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If you are not using the lachạy thử version of Windows 8, some graphics và information in this document may vary. You can get the latest version from the Microsoft Store.
Windows Product Activation (WPA) sends an installation ID number lớn Microsoft before Windows is verified, & then activated. WPA involves two numbers. One is an installation ID (generated by entering a Windows 8 product key) that the computer owner submits lớn Microsoft, either over the Internet or by phone. The second is a confirmation ID, assigned by Microsoft, which is used to activate the operating system’s software. This method is used when upgrading or installing Windows 8 from disc (not infobandarpkr.comhường. System Recovery).
OEM Activation 3.0 (OA3) takes place at the factory. A digital sản phẩm key (DPK) is installed on the motherboard BIOS during the manufacturing process. Windows 8 will activate automatically the first time the computer is connected to the Internet. With OA3-activated systems, most of the computer"s hardware can be replaced without the need khổng lồ reactivate the software through Microsoft.
If your computer came with Windows 8 pre-installed, Windows might require activation through Microsoft due to:
Replacement of the motherboard with one that does not contain the original equipment manufacturer (OEM) version of the BIOS.
Windows Product Activation (WPA): Requires a person lớn unlock the computer before Windows can be used.
OEM Activation 3.0 (OA3): No personal intervention is required normally to lớn activate Windows, but the computer must be connected to the Internet for Windows to activate automatically.
End-User License Agreement (EULA): The agreement that the Windows user must accept to lớn use the Windows hàng hóa.
Certificate of Authentiđô thị (COA): A proof of ownership identification method to help prove that a Windows hàng hóa is not counterfeit or copied. The COA might be in the form of a label that contains a bar code và product key.

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Genuine Microsoft Label (GML): A label included on computers that came with Windows 8 pre-installed. The GML indicates which version of Windows 8 was installed originally on the computer.
Installation Identification Number: A number generated based on the product key entered during Windows cài đặt.
The quickest & easiest way lớn activate your copy of Windows 8 is to activate it over the Internet. If you bởi not have an Internet connection, or if it is inconvenient lớn make a network connection, see the Other ways to lớn activate Windows 8 section of this document.
Press the Windows
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+ I keys to lớn open the Settings charm.
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If you used discs khổng lồ install Windows 8, you might find the sản phẩm key on the disc packaging. If you bought Windows 8 over the Internet, the product number might be included in an gmail you received after the purchase & tải về of Windows 8.
If you have the Windows8 disc packaging, apply the Windows 8 Certificate of Authentithành phố label khổng lồ your computer for easy reference in the future.

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You can add features to lớn Windows 8, or get a different version of Windows 8. From the Start screen, type add features to open the Search charm, and then select Add features to lớn Windows 8.1 from the tìm kiếm results. When the Add features to Windows 8.1 screen opens, follow the onscreen instructions.