Hi, I am Dave, I will help you with this.
1
An OEM licence is a pre-installed Windows licence stored on your motherboard.
2
Because your version of Windows is 7 years out of date, all normal methods to update Windows will fail and there is not way to update major versions from the Microsoft Catalog, there are only KB monthly and security updates available there not feature updates.
You can try using the Windows 10 ISO to perform an in-place upgrade using the steps below, but if that also fails, then you would need to backup your personal files, create a bootable USB and use that to clean install Windows 10.
Please follow the steps, this is then not like re-installing Windows, it is just like an update and your personal files, settings and installed software will not be affected.
Click this link:
https://www.microsoft.com/en-us/software-downlo...
to download the Media Creation Tool (Click on Download Tool Now), with that you can download the latest Windows 10 ISO (Select Create Installation Media for Another PC), then choose ISO, not USB
When the ISO file completes downloading
Disconnect from the Internet
Disconnect all external devices with the exception of a mouse or keyboard.
Temporarily disable any 3rd party Anti-virus you may have installed
Then, in Windows File Explorer, double click the ISO and then run Setup.exe and select the Install option.