Please understand that urqnKayw.dll is not a built-in dll file of Windows Vista OS. For your information, you could check and download the Vista dll files from the following webpage.
Vista and associated applications use hundreds if not more dll's and hence a comprehensive list would be next to impossible. I recommend that you try to try to unregister the dll and take it from there. Here is a link on how to do that. http://www.xp-vista.com/other/how-to-unregister-dll-files
If the unregistering or deleting, causes, issues, you can always reregister it.
Please understand that urqnKayw.dll is not a built-in dll file of Windows Vista OS. For your information, you could check and download the Vista dll files from the following webpage.