Windows 10: How do I unlink myself and all my accounts on a laptop PC I want to give away?

Altogether, I have 4 laptops. I want to give away the oldest laptop I have to my grandson. I reinstalled Windows 10 from scratch, taking off all my old folders & files completely, so it is a new Windows 10 operating system. I installed only necessary apps like Malwarebytes and SpywareBlaster.I linked all the laptops with OneDrive in the cloud so I could read the files in any of the 4. I have unlinked OneDrive and signed out on the laptop I want to give to my grandson, so they are not available to him.However, I have noticed that the PC is still showing my name as it is booting up. How do I

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Unlink an old android phone from my pc

I go thru the suggested steps: Start - Settings - Phone - Unlink this PC.

When I first open the "your phone" screen the old phone is listed. Not sure if the phone listed is suppose to be selectable or not, but my is not. When I select "Unlink this PC" the phone listed is removed. When I select "Add Phone" the old phone still
shows. I have removed the old phone from my Microsoft Account. I have rebooted after unlink this pc but I still cannot remove my old phone.

 

unlink email accounts

Hi, There are several methods or steps we can utilize to achieve your objective of unlinking your emails account with removing them. Before proceed with the different steps available, we need to further clarify on what applications or where on Windows
10 you would like to unlink the email accounts. For us to resolve your concern, kindly answer the questions below:

• The email account you wanted to unlink, is this a Microsoft account, an Outlook.com account or a third party email account?
• Where are you attempting to unlink your email account, is it on an email client you have on your desktop computer?
• If you are using an email client, are you using the Outlook desktop application or a third party email client?
• Are you pertaining to unlinking your email account from Windows 10 as a sign in option?

We look forward to your response to our queries.

 

Can anyone tell me how to delete these accounts from GMail ?

I found links that look like what I have on my gmail account with the other gmail accounts added. There are pictures and explanations. How to Sign Out of Gmail: Step-By-Step Guide >> App Authority How to unlink an account you can't sign into - Gmail Community How to remove the Gmail account name from a listing - Quora