Can you please elaborate on what you mean when you say "In the case of existing directives or permissions, for example in a company, it's not possible to delete all cookies. Sometimes you need to run Google Chrome as an Administrator to do that and, obviously, you can't do it."

Running Chrome as an Administrator should have no impact at all on Cookie deletion. A few UI bugs related to clearing browsing data have been fixed recently and this could well be a duplicate of the issue.

Can you please update this issue with screenshots of exactly what you see?

When you work for some companies they 'lock' folders of My Documents and /Program Files/ folder. You can't access to these folders and you can't erase data in Chrome. This is a huge problem for privacy.

I checked cookies and i see still exit  in chrome://settings/siteData

Is not a UI problem. 

Thank you for providing more feedback. Adding requester "elawrence@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Chrome doesn't use either MyDocuments or Program Files for storing its data, and would not function properly without read/write access to its databases. Nevertheless, yes, it is possible for a PC to be configured in such a way to break Chrome and there's nothing Chrome can do about that.

Having said that, I expect the root cause of this issue is still the since-fixed UI glitch I mentioned above, but without the information requested there's no way to prove it.