Regedit Permissions -"Access Denied" or "Error while deleting key" EVEN AS ADMIN!

Question

Anyone tried deleting a registry key in Windows 7?  Got "access denied" or "Error while deleting key"?
The usual response is, "You need to run regedit as an administrator".  but I *AM* logged in as Administrator, and running regedit as administrator, trying to assign administrator full permissions on that registry key in order to delete it!!  
Am I mistaken, or isn't Administrator supposed to be able to administer and control all the settings on the computer, in order to set it up for the "Average Joe" user?
So, under the permissions menu of that key, go to advanced, change the owner from System to Administrator, and try again.  It's no longer saying "access denied", but "Cannot delete xxxxxx. Error while deleting key".
The scenario: Basically, the wireless has stopped working on a laptop. The device does not show up in Device Manager, but is in the registry, so the normal procedure is to delete the registry entry for the device in HKLM/System/CurrentControlSet (and /ControlSet001) /Enum/PCI    ,then attach the device or restart the computer, it finds the "new" hardware and reinstalls it. Easy!...
Not with permission restrictions on the administrator account it's not!  So I need to give myself permission, to give myself permission, to do a simple task like delete a single registry key!  Why, Microsoft, why???!!!  Please just make the Administrator account a hidden "God mode" account that can do anything, and make the lives of us techies much easier in the process!  
/RANT
Now, where did I put that XP disc?!....

Answer 1

Hi,
I explain you:
Administrator does not mean "you get all rights to do anything." Administrator happens to be an account (or in your case, most likely the Local Administrators group) which by default is given some sensitive privileges like SeDebugPrivilege and
similar. However, as far as the security subsystem is concerned, it is just an account. (Very much unlike root in
Unix-like operating systems) If you aren't the owner of the key in question, and your account does not have WRITE_DAC access
to the registry key in question, then you won't be able to change the access control list on the key in question.
Try taking ownership first. By default, the local administrators group has SeTakeOwnershipPrivilege,
which allows taking ownership of any object even without the WRITE_OWNER permission
being granted by the object's discretionary access control list. Once you are the owner, you should be implicitly granted READ_CONTROL (which
allows you to read the security descriptor on the object in question), and WRITE_DAC (which
allows you to write to the DACL on the key in question). (Assuming the OWNER_RIGHTS SID
isn't in use; that's extremely unlikely)