Windows 95 DriveSpace Err Msg: Windows Cannot Perform...

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Article ID: 123441 - View products that this article applies to.
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When you use the Windows 95 DriveSpace compression utility to delete a compressed drive, the following error message is displayed:
Windows cannot perform this operation because the enhanced mode disk compression driver could not be loaded. You may need to run setup again to install additional disk components. DRVSPACE 545


This problem occurs if the Windows 95 protected-mode DriveSpace driver (DRVSPACX.VXD) is missing or corrupted. In such cases, Windows 95 loads the real-mode DriveSpace driver. Deletion operations are not possible with the real-mode driver.


To correct this problem, extract the file DRVSPACX.VXD from the original Windows 95 disks or CD-ROM. To extract the file, perform the following steps:
  1. Rename the DRVSPACX.VXD file on your hard disk. This file should be located in the WINDOWS\SYSTEM\IOSUBSYS subdirectory.

    1. To rename this file, first click the Start button on the taskbar. On the Find menu, click Files Or Folders.
    2. In the Find: All Files dialog box, type drvspacx.vxd in the Named box. Click the Find Now button.

      NOTE: If DRVSPACX.VXD is missing, that is, it is not found on the hard disk that contains Windows 95, skip to step 2 below.
    3. In the file listing box, use the right (secondary) mouse button to click the file DRVSPACX.VXD and then click Rename. Rename the file DRVSPACX.OLD and then press ENTER.

      NOTE: It is important that you use an extension other than .VXD when renaming files.
  2. Extract a new DRVSPACX.VXD from the Windows 95 disks to the WINDOWS\SYSTEM\IOSUBSYS subdirectory. To extract the file, insert Disk 11 in the floppy disk drive, or insert the Windows 95 Setup CD in the CD-ROM drive, then follow the steps below.

    1. On the taskbar, click Start. On Programs menu, click MS-DOS Prompt.
    2. At the command line, type the following
      extract /l <drive letter>:\windows\system\iosubsys <drive letter>:\A drvspacx.vxd
      where <drive letter> indicates the letter designating the drive containing the floppy disk or CD-ROM.
  3. Restart the system.

    NOTE: For additional information about the EXTRACT command, type extract /? at the MS-DOS prompt.


If DRVSPACX.VXD becomes corrupted or is accidentally deleted from the system, the real-mode driver loads by default. DriveSpace cannot perform any operation using the real-mode driver while running under Windows 95. However, some operations (such as unmount and change letter) can be performed by making changes to the DRVSPACE.INI file and then restarting the system. However, the FORMAT and DELETE commands cannot be performed without the full support of the file system. These commands cannot be run with the real-mode driver.


Article ID: 123441 - Last Review: November 15, 2006 - Revision: 1.1
  • Microsoft Windows 95
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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