Third party companies can replace the Gina.dll file that ships with
Windows NT by editing the following registry key:
Value = GinaDLL REG_SZ
If the file referenced in the registry is missing or corrupted, Winlogon
fails to start, and a blue-screen error message occurs.
NOTE: Windows NT 3.51 loads Msgina.dll if the third-party Gina.dll file is
Windows NT 4.0 is designed to not load if Gina.dll (or its replacement) is
To resolve this problem, replace the missing or corrupted Gina.dll with the
version that ships with Windows NT.
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" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete
Information in the Registry" and "Edit Registry Data" Help topics in
Regedt32.exe. Note that you should back up the registry before you edit it.
If Windows NT is installed on a FAT partition, copy the Software file that
is located in the %SystemRoot%\System32\Config directory to a floppy disk
and take it to another computer running Windows NT and follow these
- Start Registry Editor (Regedt32.exe).
- Go to the HKEY_LOCAL_MACHINE window.
- Select the HKEY_LOCAL_MACHINE key entry.
- From the Registry menu, click Load Hive.
- Browse and select the failed Windows NT installation path, for example,
- Go to the System32\Config directory, and select the Software file.
NOTE: Software file with no extension is the correct one.
- Click OK, and type a key name of test.
- Double-click the new test key and follow this path:
Microsoft\Windows NT\Current Version\Winlogon
- Modify the entry Ginadll:REG_SZ:MSGINA.DLL
- From the registry menu, click Unload Hive.
- Restart into the original Windows NT installation.
Microsoft recommends that third-party companies use FAT volumes to test
their versions of Gina.dll. This facilitates the replacement of the new