After you install the Cisco Systems VPN Dialer program, you can no longer use the Fast User Switching feature in Microsoft Windows XP. If you try to turn on Fast User Switching, you receive a message stating that a program used CSGina.dll to disable the Fast User Switching and the Windows Welcome screen features.
Note By using Fast User Switching, multiple users of the same computer can quickly switch between their respective logons without actually logging off the computer, as long as it is not joined to a domain. Additionally, users do not have to quit the programs that they are running when they switch between logons by using Fast User Switching.
This issue occurs if the Microsoft Graphical Identification and Authentication file (Msgina.dll) is replaced by a third-party program. This issue occurs because when you install the Cisco Systems VPN Dialer program, it overwrites the Msgina.dll file with its own Graphical Identification and Authentication (GINA) filter driver file (CSGina.dll). Cisco Systems VPN Dialer requires the Csgina.dll file for the correct function of the VPN program.
Note This issue that is described in the “Symptoms” section of this article may also occur when you install other third-party programs that replace the Msgina.dll file.
To work around this issue, restore the Msgina.dll filter driver in the Windows registry, and then remove the Cisco Systems VPN Dialer program. To do so, follow these steps:
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate, and then click the following registry sub key:
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.