Article ID: 219392 - View products that this article applies to.
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Hiding the system drive as described in the following article in the Microsoft Knowledge Base
158457does not work for the system drive in the Windows NT Explorer view. The system drive is hidden from view in My Computer and in default system file Open/Save dialog boxes.
(https://support.microsoft.com/kb/158457/EN-US/ )Defining Local and Remote Drive Visibility Under WinNT 4.0
In Windows NT Explorer view, all drives but the system drive can be hidden.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
Microsoft has confirmed that this is a problem in Windows NT 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.