Solution to ‘gtgina.dll disables fast user switching’ Problem

When you reboot your Windows XP computer after installing the Linksys WUSG54GC USB wireless adapter, you find that Windows Welcome screen and Fast User Switching are disabled. When you try to enable Fast User Switching through Control Panel, the following error message flashes on your PC:

"A recently installed program has disabled the Welcome screen and Fast User switching. To restore these features, you must uninstall the program. The following filename might help you identify the program that made the change: GTGina.dll."


The above behavior is by design. The Linksys adapter WUSG54GC employs Leap Security, for which functional Fast User Switching must be disabled.

When you install the Linksys adapter WUSG54GC, GTGina.dll disables (1) Windows XP  startup Welcome Screen (2) Windows XP Fast User Switching Feature.

Possible Workarounds

Workaround 1

Install the adapter without including the Linksys Wireless Network Monitor software. Instead, just install the Linksys adapter (WUSG54GC), and configure and connect wireless networks using Windows XP’s Wireless Zero Configuration.

Workaround 2

Note: The following steps require you to make changes to the Windows registry. Perform the steps exactly as shown below, as incorrectly editing the registry can cause irreversible damage to your computer. Also ensure that you make registry backups before editing it. You may use a reliable registry maintenance software for this purpose.

  1. Click Start.
  2. Click Run.
  3. In the Open box, type regedit and then press Enter.
  4. In the Registry Editor window, browse to HKey_Local_Machine\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon
  5. Locate and delete the registry key GTGina.dll.

Workaround 3

  1. Open the LINKSYS COMPACT WIRELESS program folder and copy the subfolder WUSB54GC to C:\Program Files.
  2. Remove Linksys wireless USB device.
  3. Click Start>Control Panel>Add or Remove Programs.
  4. Locate and select Compact Wireless-G USB Adapter Wireless Network Monitor.
  5. Click the Uninstall button.
  6. Restart Windows.
  7. Plug in a Compact Wireless USB Adapter.
  8. Install the drivers inside the WUSB54GC folder that you copied in Step 1.

Workaround 4

  1. Open the Add or Remove Programs window and uninstall the software.
  2. Keep the Wireless adapter plugged in.
  3. Insert your Linksys installation disc in your CD-ROM.
  4. Start the set up and let it finish.
  5. Press Ctrl+Shift+Esc to open Windows Task Manager.
  6. Locate and select Linksys setup application.
  7. Click the End Task button.
  8. Click Start.
  9. Click Run.
  10. In the Open box, type regedit and then press Enter to open the Registry Editor window.
  11. Click the Edit menu, and then click the Find command.
  12. Type GTGina.dll in the Find What box, and then click the Find Next button.
  13. Right-click on the GTGina.dll entry, and then select Delete.
  14. Close Registry Editor.
  15. Restart Windows.