Ensure Microsoft .NET Framework 4.0 is installed correctly. You can find the installer on your Dragon disc under ISSetupPrerequisites \ dotNetFramework .
Uninstall Dragon, use the Nuance Cleaner Tool to remove registry remnants, and reinstall after a Clean Boot .
Select , follow the prompts to finish, and reboot your computer. 2. Enable User Account Control (UAC)
If the basic fixes fail, the installation itself may be corrupted.
Does this error occur , or only when you try to open a specific user profile ? Information on error "Failed to launch 64-bit server"