PC purchase
Genuine Microsoft Labels

A Genuine Microsoft Label (GML) should be found on new devices that:

  • Have been preinstalled with or licensed for Pro editions of Windows 8, Windows 8.1 and Windows 10.
  • Have been preinstalled with or licensed for Windows 8, Windows 8.1 and Windows 10 shipping into China (with the exception of Hong Kong and Macau).
  • Are licensed for a Windows Pro product, but have been pre-installed with a Windows 7 Professional downgrade. These devices are licensed for Windows 8 Pro but not pre-installed with Windows 8 Pro. These devices would include a GML.

Software is intellectual property, and licenses provide the right to use the software and define the conditions of use. Only "Qualified Educational Users" are eligible to acquire Microsoft Academic Edition Products, those “Qualified Educational Users” are listed here:

  • Educational Institutions
  • Administrative Offices & Boards of Education
  • Teachers, Faculty and Staff
  • Students
  • Public Libraries
  • Public Museums
  • Home-School Programs

Users that are not members of one of the eligible groups above should not have access to Academic Editions of product and are not eligible for the license terms offered to these groups of educational users.

The GML label is used to help users identify the edition of Windows preinstalled on a device and is also an indicator of whether the device is preinstalled with or licensed for genuine Windows. Most commonly the label is found on the back or bottom of the device.
Some devices, such as Windows Phones or Windows tablets, may not have a GML affixed to the device. There are multiple things to look for when buying a Windows device to help identify if it is genuine. Get tips about buying genuine Microsoft software or make sure you have the right licensing for your business.
See the following examples of the Genuine Microsoft Labels:
Color-Shifting Ink
The color shift on the label is designed to change from one color to another when viewed from different angles, making it easy to determine if it is genuine.
Genuine Microsoft LabelsGenuine Microsoft LabelsGenuine Microsoft LabelsGenuine Microsoft Labels
  • Windows, Windows 8:
    magenta to green
  • Windows Pro, Windows 8 Pro, Windows Pro Academic:
    blue to purple
  • Windows RT:
    turquoise to purple
Tamper Evident
The Microsoft Labels also include a tamper evident feature that appears upon label removal
Tamper EvidentTamper Evident
Certificate of Authenticity (COA)

The COA is a sticker or a label that is often attached to the body of a computer for some versions of Windows or Windows Server. You can typically find the COA sticker on the body of the computer or, for some newer laptops, inside the battery compartment.

COAs and/or product keys should never be purchased separately from the product.

Standalone COAs
Definition: Standalone COAs are COAs that are sold by themselves, without the accompanying software they authenticate. They are often branded as “excess inventory” or “unused labels” and are often counterfeit COAs. Purchasing standalone COAs and passing them off to unsuspecting customers is a form of piracy. How to Avoid: COAs should never be sold, shipped, or purchased on their own, without being affixed to a PC or sold with related Microsoft software (either full packaged product or Microsoft OEM software acquired by system builders). Do not fall victim to standalone COAs.
Windows 10
For COAs affixed to computers preinstalled with or licensed for Windows 10, the COA features the product name printed on the label and also contains anti-counterfeit security features such as:
  • Intaglio print – uses a specialist method of printing that leaves raised ridges of ink on the surface of the label. You can feel this by running your finger over the surface. The right side of the label should feel smoother than the Intaglio printed area on the left.
  • Latent Image - Look straight at the label and then move to a very shallow viewing angle, for example by tilting the label away from you, an “M” will become visible just below the Windows logo.
Certificate of Authenticity (COA)Certificate of Authenticity (COA)

Earlier versions of Windows

For COAs affixed to computers preinstalled with or licensed for versions prior to Windows 10, the COA features the product name printed on the label and also contains anti-counterfeit security features such as:
  • Interwoven security thread – is built into the paper and random paper fibers are visible when the thread appears at the surface
  • Color shifting ink edge - changes from green to magenta when viewed from different angles
If you don’t see a Genuine Microsoft Label or COA on systems pre-installed with the Professional edition of Windows, it’s likely that Windows isn’t properly licensed on that PC and may even be counterfeit software. Get tips about buying genuine Microsoft software or make sure you have the right licensing for your business.
Certificate of Authenticity (COA)Certificate of Authenticity (COA)

Product Key Concealment

In addition to the features mentioned above, effective July 19, 2016 this concealment solution has been expanded to all products which utilize a 25-character product key. The concealment panel consists of a small clear label with removable silver scratch off material that has been applied to conceal a portion of the 25-characters of the product key.

Similar to the removable material commonly found on lottery tickets or prize vouchers, this concealment panel is designed to protect the consumer’s product key from being obtained and used by unauthorized individuals. When a Product Key is required for use by the rightful owner, the silver scratch off material should be removed with a fingernail to reveal the entire 25-characters required to enable activation of the Product.

A simple glance can allow a consumer to observe whether a COA label may have been tampered with. The removable silver material should be fully intact and covering a portion of the 25-characters’ of the product key. If upon receipt, a sufficient amount of the covering silver material has been removed and the entire 25-character product key is exposed, this could indicate that the COA label has been tampered with and there is a potential that the product key has been compromised or used in an unintended manner. If you experience any difficulty using the key for activation, please contact the OEM (Original Equipment Manufacturer) for support.

If the removable silver material is not present on the concealment panel at all, there may be a clear film label retained in this area, which is evidence that the concealment feature was present and the scratch off material has been removed.

This concealment protection feature has been added to the COA with the Microsoft’s consumer in mind. Microsoft is taking this additional step to protect against unauthorized use of a product key. Consumers should also be aware that product keys are valuable targets for piracy, and it is prudent that precautions be taken to avoid unauthorized access or use of product keys wherever possible.

COA Removal InstructionsConcealed Certificate of Authenticity (COA)COA Removal InstructionsCOA Removal Instructions
Small Embedded Product COAs:
This label is used on products that contain embedded versions of Microsoft software and is often found inside the device such as in a battery compartment. The label features micro text in yellow behind the black product details text.
Reinstallation or recovery software
Refer to the documentation that came with your PC to find the appropriate reinstallation/recovery solution. Most PCs come with a separate recovery partition on the PC’s hard drive. Sometimes recovery software can be downloaded from your manufacturers website or comes on a disc or USB included with a new or used PC purchase. Reinstallation or recovery software is provided so that you can reinstall or recover the software if it stops working properly. If you try to install software from recovery media on a PC other than the one it was originally shipped on, you may not be able to activate and/or use it.Note: If you purchased a boxed package or digital download of Windows, please visit http://www.microsoft.com/ to download back-up copies of Windows media.
Reinstallation or recovery media
Simple things like spelling errors on packaging can help you identify counterfeit software accompanying a PC purchase. Incorrect logos and photos that don’t quite correspond to the product you’re purchasing can also provide clues that something isn’t quite right. Back to top

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