Which is the best to purchase Windows 10 PRO OEM or FULL RETAIL PACK?

I want to purchase genuine Windows 10 professional OS for my new system.

My first question is “ Which is the best Windows 10 PRO OEM or FULL RETAIL PACK”?

I have referred below link :

It shows :
“You reached the limit on the number of times you can reactivate Windows on your device.”
What does above sentence signify? What is the limit for activation? Is it related only to new hardware changes?

If there is requirement to change hardware say Motherboard or Hard disk with same or different make & model number, then will the system get activated in OEM as well as FULL RETAIL PACK with the same copy (serial number) after linking the Microsoft account?

My second question is :
If I am formatting the system every 3/6 months, will there be any problem for activation related to the below sentence?
“You reached the limit on the number of times you can reactivate Windows on your device.”

Waiting for reply as soon as possible.



Full version (Retail):

- Includes transfer rights to another computer.

- Can change the motherboard

- 90 days of technical support

- Doesn't require a previous qualifying version of Windows.

- Expensive

OEM System Builder version:

OEM versions of Windows 10 are identical to Full License Retail versions except for the following:

- OEM versions do not offer any free Microsoft direct support from Microsoft support personnel

- OEM licenses are tied to the very first computer you install and activate it on

- OEM versions allow all hardware upgrades except for an upgrade to a different model motherboard

- OEM versions cannot be used to directly upgrade from an older Windows operating system

You can reinstall and reactivate Windows 10 either full retail or OEM System Builder as many times as you like on the same computer. 

When you upgraded from a previous version of Windows or receive a new computer preinstalled with Windows 10, what happened is the hardware (your PC) will get a digital entitlement, where a unique signature of the computer will be stored on Microsoft Activation Servers. The Windows 7 or Windows 8 genuine license you were previously running will be exchanged for a diagnostics key.

Anytime you need to reinstall Windows 10 on that machine, just proceed to reinstall Windows 10. It will automatically reactivate.

There is no need to know or get a new key, but if you have issues with Digital Licensing or the Activation Troubleshooter, you can utilize an existing Windows 7 or Windows 8/8.1 product key you already ownto reactivate if necessary. or use the reset function in Windows 10.

If you are prompted to enter a product key, click 'I don't have a key' and 'Do this later'

Windows Insider MVP
MVP-Windows and Devices for IT

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Question Info

Last updated October 11, 2021 Views 25,028 Applies to: