Windows – Access Denied in “Temporary Internet Files” folder in Windows7

Seems there's no other way than to boot into safe mode to do it. That worked at least. Typical Microsoft bullcrap.

You do not always have an access to the files, even you are an administrator. In Windows, there are permissions, but also ownership. For example, on Windows Vista and later, if you try to remove a system file as an administrator, you will not be able to do it, since you are not an owner of this file, and the owner (one of the systems accounts, don't remember which one) did not grant you a permission to modify or remove the file.

Now, gladly as an administrator, you can change the owner of a file. Go to:

File Properties → Security → Advanced → Owner → Edit.

Select your name in "Change owner to" list and click Ok on every opened window (confirming all those annoying message boxes which will appear). Now you can grant permissions you want to yourself and access, remove or modify the file.

What do you mean when you say "and Security Tab is already missing"? Do you have Security tab for other drives? I'm pretty sure this tab is here even when a user does not have an access to the file, directory or a whole disk, at least for an administrator.

Probably it is something to do with your options. Maybe "Simple file sharing", a crappy thing like this which made everything really difficult when enabled under Windows XP?