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I encounter this every now and then, usually when trying to uninstall drivers or something like that. The general sequence is this:

1) Try to delete a folder. Get "You need admin!" message. Even when I am admin and/or click the shield icon.

2) Enter the folder.

3) Select and delete the entire contents of the folder, barring any hidden files that I didn't get caught in the select. No prompt for Admin.

4) Leave the folder.

5) Delete the folder. No prompt for admin.

I must be completely misunderstanding the security model of window, because from how I understand things, this doesn't make any sense. What is going on here?

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Can you provide a screenshot of the permissions for a folder your unable to delete. – Ramhound Jul 23 '13 at 2:30
I will try the next time I encounter this problem, but it doesn't happen very often. I don't really uninstall device drivers very often :p – Drew Jul 23 '13 at 2:45

which files are in this folders? Video files? Maybe the DLLhost.exe tries to load the thumbnails and this prevents you from deleting it.

You can also use ProcessExplorer to search for open handles to that folder. So here you can see which files still use data from a fodler:

enter image description here

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This sounds like a likely culprit. I'll check for this next time I see it. – Drew Jul 23 '13 at 4:52

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