Some used computers with a COA come with a detailed history report.A COA used computer passes through multiple tests before it is re-issued. Sometimes the tech person just tweaks the system a bit and places it back on the shelf. You do not know exactly if the necessary repairs are finished. The difference between a refurbished computer and a used computer with a COA is simple. A COA tells the customer that the repairs are done. There comes a time, in the life of every computer, when it needs to be repaired. The COA also shows that repairs that were needed have been completed.That you will have to double-check on to be sure. You will also have many benefits, which could include tech assistance. The certified used and new computers will come with a warranty.You probably already know the benefits of buying a new certified computer, so I will no go into that. Now, just so you know, you can also buy used computers with a COA. What Are The Benefits Of Buying One With A Computer COA You enter the numbers to set everything up, and you should be good. It should match because you will see the corresponding numbers( the numbers should match each other). You will be directed to enter the 25-digit key found on the OS into the system. The certification is going to be there, it will just come separately(one certification for the OS and the computer). You will have to buy an independent OS for your computer. A new verification is issued when that happens. Sometimes you find a computer without the OS. What Happens When The Product Is Sold Without An OS? They want to know the merchandise is genuine. Some customers come back looking for other products connected to the Restore Media system. Restore media( a company that works with computer manufacturers) needs to know the information too. That way they know right away whether or not they should buy the product. Some customers want to see the information place in ads. There are many reasons why companies go through the certification process. The sticker lets the owner know they can communicate with the original manufacturer if an issue arises. It is better to see the COA and remove all doubts in your mind. This Certificate of Authenticity verifies that the system is real instead of a fake (which sometimes happens with Windows products). You can find it near the 25-digit code key at the bottom.

You can find it on computers that have Windows 7 and 10, but it can be found on other Windows products too. A COA is a sticker you will find on the bottom of the computer system.

This is not a coa windows 10 pro