Security Permissions on network folder.

I have a 1TB HDD connected via the network. 90% of the folders on this drive are fine, but a few were created by previous Windows installs.
I needed to delete the folder but it won't let me do so. I've tried fiddling with the security settings but they wont "stick". See the attached for what I mean.

I can't do anything with this folder. This is also happening on other folders and I've experienced this annoying issue over the years. Finally knowing an answer would help a great deal.
I can rename the folder, but everything inside the folder and the folder itself cannot be removed.

Attached Thumbnails

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