deak
If on a network admin. may have imposed policies, if not then try..
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Go to Start-Settings-Folder Options-File Types,
Scroll down the list of the Registered file types,
...
Folder
...
select the "Folder" file types, click the [Edit] button,
Actions,
explore
open
Now you can see the "explore" is in bold face but the "open" is in normal.
Select the "open" and click the [Set Default] button.
The "open" is changed to be in bold face.
Close, Close.
See if it is back to normal and let's know the result.
...
courtesy
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or
Check the registry key:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
If there is a DWord there with the name:-
NoControlPanel
It should have a value of 0 to allow control panel to be shown in
start menu and a value of 1 to restrict the control panel.
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smitee