How to Fix RtlGina2.dll error
After installing a Netgear WG111 USB wireless network card for a customer, I noticed it changed the Windows XP Welcome screen options and now displayed the classic login prompt.
Before installing the Netgear WG111 adapter, the Welcome Screen would show each individual user and you could click on the user to log in.
I immediately went into the Control Panel and User Accounts and discovered that the Welcome Screen and Fast User Switching had been disabled. When I tried to enable the Welcome screen I was prompted to delete the file RtlGina2.dll. I traced this file to the installation of the WG111 software. It seems RtlGina2.dll replaced the normal login file MSGINA.dll and was causing the issues with the Welcome Screen.
Doug Knox, a Microsoft Most Valuable Professional (MVP), wrote a program to reset the registry to use the standard Windows GINA DLL file and return the use of the Welcome Screen in Windows XP.
Visit Doug's site at the following URL, download the file to your hard drive and run it to reset the registry and fix this issue. After running the file, reboot your computer.