Windows 10: What's the deal with these Microsoft Windows 10 OEM Packages?

Hello, can please someone with more knowledge clear the waters for me because I am really struggling to understand few things regarding the Microsoft Windows 10 sold both on eBay and Amazon.

For example, the following links show an unopened package of Windows 10 Pro OEM with COA included. Is this alright to buy and use under the system builder OEM legislation?

https://www.ebay.co.uk/itm/Windows-10-Pro-64-Bit-DVD-Disk-KEY-COA-OEM-Free-P-P/193651706035

Another example Windows 10 Home
https://www.ebay.co.uk/itm/NEW-Genuine-Microsoft-Windows-10-Home-64Bit-OEM-DVD-Disc-KEY-COA-Sticker/373065150938?hash=item56dc6a71da:g:sA0AAOSwgYdezQrG


I really wish to hear few opinions regarding these listings, what's their origin and if it's alright to use them as a system builder selling brand new computers to customers as a system builder and providing full maintenance for each machine.

:)

 

my windows 10 oem didn't come with a product key

Dude, go to Newegg right now and read the questions and answers tab on Windows 10 OEM. The OEM copies that are listed there DO in fact, come on an optical disc. The flash drive ONLY comes on Retail copies.

 

Microsoft Selects Dolby Audio for Windows 10

it would've been great if microsoft added HEVC decoders, LAV filters along with other codecs with Windows 10, and developing WMP to be better than VLC, KMPlayer and such sorts of media players.

Nevertheless, this is good step for microsoft, by far.

 

Windows 10 Tweaks

As you may already know, Windows 10 (as well as Windows 8) allow you to log in with a valid Microsoft account, instead of creating a local account that only works on your machine. However, you may prefer to keep a local account for privacy reasons. If you do, though, some Windows 10 features—like Cortana—may not work. Despite the default behavior, the Windows 10 Store is not one of them. You can still log in to your Microsoft account for just the Store without switching to a full Microsoft account. The process, however, is not terribly obvious. To do so, follow these steps:

• Launch the Store from your Start menu.
• Click the user icon next to the search box.
• Click “Sign-in” from the menu that appears.
• Choose “Microsoft account” and log in like normal.
• When the “Make it yours” box appears do not enter your password. Instead, click “Sign in to just this app instead.”

from Lifehacker