The file t5000ui.dll is an OEM UI Test Module created by Microsoft Corporation. The exact uses of this file are not clear, but it was included in some versions of Windows XP and may be a part of other applications built using Windows technology.
An error with this file may disable any program that relies on it. You should use a registry cleaner to find and repair any errors in the registry related to this file. The registry works as an information booth at the heart of Windows. It tracks every file installed on your computer along with information on how to use those files. If a registry entry for a file has an error, you will not be able to run any programs that need that file.
It is possible to edit the registry yourself, but not advised. Even computer experts hesitate to edit the registry because a single mistake could disable your entire computer. ZookaWare PC Cleaner takes care of the registry for you. ZookaWare PC Cleaner cleans up registry mistakes to get your system running smoothly.