Hi L,
I'm Roshan V S, Windows expert and a Windows user like you.
I appreciate you for providing details about the issue and we are happy to help you.
Go to properties window of the local drive -> Security tab -> Remove the complete list from "Group or user names"
Once done add your name (Admin) and give full control from the checkbox below.
Do get back to us with the result. We will be glad to help if you need further assistance.
Best Regards
Roshan V S
Indepedent Advisor