A recent attempt to upgrade a piece of software failed because it couldn't access a folder. I tried to take a look at the folder in Explorer and was told:
D:\folder is not accessible. Access is denied.
When I look at the properties of the folder and click on the Security tab, a message pops up saying:
You do not have permission to view the current permission settings for folder, but you can make permission changes.
When I attempt to give myself access to the folder, I'm told:
Unable to save permission changes on folder. Access is denied.
I am an administrator, it said I could change the permissions, but then reneged. How do I regain control of that folder?