Hi, Moby.
You DID change the default setting in Folder Options | View to Show hidden
files and folders, didn't you?
Sometimes we can do things from the Command Prompt that we cannot do
(easily, at least) from the Graphical User Interface.
Open a "DOS" window: Start | All Programs | Accessories | Command Prompt
In the "DOS" window, you can use nearly all of the commands that we could
use under true MS-DOS. To see a mini-Help file for any command, type the
command, followed by "/?" (without the quotes); for example: dir /?
Navigate to the parent folder of your missing folder. Type dir /a. The /a
causes dir to show you All files and folders, no matter what Attributes
(including Hidden) may be set. If your folder name is not in this list,
then it is not in that parent folder. (You may use wildcards to narrow down
your search if the list is too long.)
If you think the missing folder may be somewhere else on your HD, you can do
a longer, more thorough search by adding the /s switch. Starting in the
Root of the volume, you can search all of it for your missing folder. For
example: dir C:\<foldername> /s/a
Give it some time, but if this doesn't show the folder, it no longer exists
in C:.
When you do find the folder, use the Attrib command to remove the Hidden
attribute: attrib -h <foldername>
There may be other causes for your "Access denied", so if you still can't
access the folder, post back with details of what you did and what results
you saw.
RC