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Drive Not Displayed in My Computer After Adding New Hard Disk

This article was previously published under Q173485
IMPORTANT: This article contains information about editing the registry.Before you edit the registry, make sure you understand how to restore itif a problem occurs. For information about how to do this, view the"Restoring the Registry" Help topic in Regedit.exe or the "Restoring aRegistry Key" Help topic in Regedt32.exe.
SYMPTOMS
After you add a new hard disk, either the new hard disk or a preexistingdrive (such as a CD-ROM drive) may no longer be listed in My Computer.The drive remains accessible from a command prompt.
CAUSE
When you create a compressed hard disk volume, the compressed volumereceives the drive letter of the original drive (for example, drive C),and the original uncompressed (or host) drive is relocated to a higherdrive letter (for example, drive E).

When the compressed volume is created, Explorer.exe is instructed to notshow the host drive in My Computer (in this example, drive E.)

When you add a new hard disk, it receives a drive letter assignment (forexample, drive D), causing all subsequent drive letters to shift by one.For example, if a CD-ROM was drive D, it is relocated to drive E.

When Explorer.exe follows its instructions not to show drive E, itinadvertently hides the CD-ROM drive instead of the actual host drive(which has now moved to drive F).
RESOLUTION
WARNING: Using Registry Editor incorrectly can cause serious problemsthat may require you to reinstall Windows 95. Microsoft cannot guaranteethat problems resulting from the incorrect use of Registry Editor can besolved. Use Registry Editor at your own risk.

NOTE: For information about how to edit the registry, view the ChangingKeys And Values online Help topic in Registry Editor (Regedit.exe). Notethat you should make a backup copy of the registry files (System.dat andUser.dat) before you edit the registry.

To work around this issue delete the "NoDrives" value in the followingregistry key:
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\       Policies\Explorer
After you make this change, log off and then back on to the computer.

This instructs Explorer.exe to show all drives.
4.00 missing
Properties

Article ID: 173485 - Last Review: 01/20/2007 02:25:32 - Revision: 1.2

  • Microsoft Windows 95
  • Microsoft Windows NT Server 3.51
  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • kbui KB173485
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