Stop: C0000143 Caused by PCAnywhere

 Last reviewed: January 8, 1998
Article ID: Q176989
The information in this article applies to: 

  - Microsoft Windows NT Workstation version 4.0
  - Microsoft Windows NT Server version 4.0

IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information on how to do this, view the "Restoring the Registry" online Help topic in Regedit.exe or the "Restoring a Registry Key" online Help topic in Regedt32.exe.

SYMPTOMS

After installing the product "PC Anywhere" and restarting, the following STOP blue screen error message is displayed: 

   STOP: c0000143
   The required system file Display_driver.dll is bad or missing.

CAUSE

The AW_Host.sys file continually adds one or two AW_HOST key(s) to the registry when you restart the computer.

RESOLUTION

To resolve this problem, first read and follow the steps from the following Microsoft Knowledge Base articles. 

   Article-ID: Q170397
   Titled    : STOP: 0XC0000143 Missing System File. Display_Driver.dll

   Article ID: Q162577
   Titled    : STOP: C0000143 MISSING DISPLAY_DRIVER.DLL
If neither of these articles apply, you can try the following:
  • Install Windows NT Server 4.0 into a parallel installation. Delete the AW_Host.sys from the %systemroot% directory.

For information on how to modify the registry of a secondary installation and disable services, refer to the following Microsoft Knowledge Base article: 

   Article-ID: Q165748
   Titled    : How to Disable a Service or Device that Prevents NT from
               Booting
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" online Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" online Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

Use Regedt32 to change the following registry entries in the failing Windows NT %systemroot%\system32\config\system hive by following these steps:

  1. Run Regedt32 and load the System hive from the failing Windows NT installation.

    NOTE: This key will be called Your_name in the steps below. Substitute the correct name for your computer.

    a. In the HKEY_LOCAL_MACHINE\Your_name\controlset001\services\AW_HOST 

          key, change the value of Start:REG_DWORD: to 0x4.
    b. In the HKEY_LOCAL_MACHINE\Your_name\controlset001\services\awhost32 

          key, change the value of Start:REG_DWORD: to 0x4.
    c. In HKEY_LOCAL_MACHINE\Your_name\controlset001\services\vgasave key, 

          change ImagePath to systemroot\system32\drivers\vga.sys.
    d. In the HKEY_LOCAL_MACHINE\Your_name\controlset001\services\vgasave 

          \device0 key, change InstalledDisplayDrivers to vga.


          NOTE: The above registry key is one path; it has been wrapped for
      readability.

    e. In the HKEY_LOCAL_MACHINE\Your_name\controlset001\services\vgastart 

          key, change ImagePath to \systemroot\system32\drivers\vga.sys.
    f. In the HKEY_LOCAL_MACHINE\Your_name\controlset001\services 

          \vgastart\device0 key, change InstalledDisplayDrivers to vga.


          NOTE: The above registry key is one path; it has been wrapped for
      readability.

  2. Select the Your_name hive, click Unload Hive from the Registry menu, and then exit Regedt32.

  3. Copy the Vga.sys (%systemroot%\system32\drivers) from your parallel installation to the original installation of Windows NT.

  4. Copy the Msgina.dll and Vga.dll (%systemroot%\system32) from the parallel installation to the original installation of Windows NT.

  5. Shut down and restart your computer in your original Windows NT installation.

Additional query words: c143 PCanywhere
Keywords : NTSrvWkst
Version : WinNT:4.0
Platform : winnt
Issue type : kbprb

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Last reviewed: January 8, 1998
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