Not very security related, but something I don't want to forget how to do. It was a PITA. So I had a old WINDOWS directory that I needed to get rid of. And the following commands gave me the ooomph needed to get the job done.
1) Get a SYSTEM shell so all modding of permissions will be good.
D:\> psexec /accepteula -s cmd
2) Grant Administrators FULL rights to the directory and all sub directories and files
D:\> icacls D:\Windows\* /grant Administrators:F /C /T
3) Finish the job, delete the folder and everything below it
D:\> rmdir /s /q D:\Windows\
All done. Weeeeeeeee!
If you have a better way to do this via commands or programs please let me know, always looking to learn more.