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Missing Drives in My Computer and Windows Explorer

This article was previously published under Q191579
When you view My Computer or Windows Explorer, some or all of your drivesmay be missing. When you view Device Manager, the missing drives may bedisplayed, and you may be able to gain access to the drives by clickingStart, clicking Run, typing the drive letter in the Open box, and thenclicking OK. The drives are accessible at a command prompt or in Safemode, and can be access by ScanDisk and Disk Defragmenter.
This behavior can occur if the PowerToys TweakUI tool is installed andconfigured to hide one or more of your drives.
To resolve this behavior, follow these steps:
  1. Click Start, point to Settings, and then click Control Panel.
  2. Double-click TweakUI.
  3. On the My Computer tab, click to select the check boxes of the drives that are currently hidden.
  4. Click Close, and then restart your computer.

Windows Millennium

This issue can occur if you install TweakUI in Windows 98, and then upgrade to Windows Millennium. You can also install TweakUI on Windows Millennium.

Windows 98

If the TweakUI tool is not installed, install it from the Windows 98CD-ROM and then follow steps 1-4. For information about how to installthe TweakUI tool, please see the following article in the MicrosoftKnowledge Base:
190643 How to Install and Uninstall the TweakUI Tool in Windows 98

Windows 2000

This resolution may also work in Win 2000, if TweakUi was installed prior to upgrading the OS.
The TweakUI tool can also be used to hide mapped network drives.

Article ID: 191579 - Last Review: 05/28/2007 03:20:29 - Revision: 3.3

  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows Millennium Edition
  • Microsoft Windows 98 Standard Edition
  • Microsoft Windows 95
  • kbprb kbui KB191579