Windows 10: How can I activate Windows 10 when I no longer have the free reservation

Years ago I signed up for the free upgrade to Windows 10 on an email address that has since been deleted due to repeated secutity concerns (Yahoo email).
I've had Windows 10 loaded onto my PC after upgrading almost every component of my PC in recent weeks, but now Windows 10 is requiring me to activate it with a constant watermark on the lower right hand side of my screen, and I can't find the original activation code for Windows 10 that I used to have.
I can login to my microsoft account, but can't find any record of my reserving my windows 10 upgrade, with my current or obsolete email addresses.

Can anyone help me please?

:)

 

I'm a bit confused about this reservation on the Windows 10.

Hi Colton,

Thank you for posting your query in Microsoft Community.

I suggest you to cancel the reservation and reserve it again.

Refer to the below steps to cancel the reservation.

• 
  Right click on the Get Windows 10 App or Windows icon located in right end of the taskbar.
  
• 
  Select “Check your upgrade status”
  
• 
  Select “Cancel reservation”
  

Refer to the below link to reserve Windows 10.

Questions about reserving Windows 10

Reply with the status of the issue, I will be happy to help you.

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

DOWNLOAD WINDOWS 10 NOW - Upgrade and ISO direct from microsoft

Click to expand... Yeah I went to that site, why do I need to buy a key?
I won't buy a key, stupid.

I'll revert back to windows 7 then.

When I still was on windows 7, about a year ago I added 4GB extra ram which is a total of 8GB now,
is that causing the problem?