STOP 0xC000021A in Winlogon Caused by PCAnywhere (195027)

RESOLUTION

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To resolve this issue, follow these steps:

1. Perform a parallel installation of Windows NT to provide access in renaming the file or follow the steps in the following Microsoft Knowledge Base article:

   164471 Replacing System Files Using a Modified Emergency Repair Disk

2. Restart the computer by using the new Windows NT installation.
3. Install the latest Windows NT 4.0 service pack. You may have to do this if you must replace files from the previous installation.
4. Disable the pcANYWHERE service in the previous installation so that pcANYWHERE does not initialize. For additional information about how to do this, click the following article number to view the article in the Microsoft Knowledge Base:

   165748 How to Disable a Service or Device that Prevents NT from Booting

5. Click Start, click Run, type regedt32, and then click OK.
6. Click the Window menu and then click HKEY_LOCAL_MACHINE on Local Machine. Click the Registry menu, and then click Load Hive. Type the path to the System hive of the previous installation ( %Systemroot%\System32\Config\System), and then click Open.
7. When prompted for the name of the key, type test.
8. Locate the following registry key:

   HKEY_LOCAL_MACHINE\TEST\ControlSetXXX\Services\AW_HO

   Double-click the Start value, type the numeral four in the Data box, and then click OK to turn off the AW_HOST service in the previous installation.
9. Locate the following registry key:

   HKEY_LOCAL_MACHINE\TEST\ControlSetXXX\Services\AWHOST

   Double-click the Start value, type the numeral four in the Data box, and then click OK to turn off the AW_HOST service in the previous installation.
10. Double-click the minus sign in the folder that represents the TEST key, click the TEST key, and then in the Registry menu click Unload Hive to save the registry changes to the previous installation's SYSTEM hive.

Windows NT should now start correctly. Shut down the parallel installation, and try to start the computer by using the previous version of Windows NT. If you still cannot log on successfully and continue to receive the STOP 0xC000021A error message, Microsoft recommends that you modify the GINA startup value in the registry. To do this:

1. Restart the computer by using the newer Windows NT installation.
2. Click Start, click Run, type regedt32, and then click OK.
3. Click the Window menu, click HKEY_LOCAL_MACHINE on Local Machine, click the Registry menu, click Load Hive, type the path to the Software hive of the previous installation ( %Systemroot\System32\Config\Software), and then click Open.
4. When prompted for the name of the key, type test.
5. Locate the following registry key:

   HKEY_LOCAL_MACHINE\TEST\Microsoft\Windows NT\Current Version\WinLogon

6. Double-click the GinaDLL value, replace the Awgina.dll text with Msgina.dll, and then click OK.
7. Verify that the Windows NT 4.0 Service Pack 3 version of the Msgina.dll file is in the path that this registry key specifies. If it is not there, copy this file from the newer installation to the previous installation.
8. Double-click the minus sign in the folder that represents the TEST key, click the TEST key, and then on the Registry menu click Unload Hive to save the registry changes to the previous installation's SYSTEM hive.
9. Quit Registry Editor, and then restart the computer by using the previous installation of Windows NT.