Flat rate is common in broadband access to the Internet in the USA and many other countries. A charge tariff is a class of linear rate, different from the flat rate, where the user is charged by the uploads and downloads (data transfers).
MUI stands for Multilingual User Interface and .dll.mui files are simply libraries(Dlls) that contain resources dedicated to localization : for an application to support multiple languages,dlls containing specific resources must be available eg language resources(arabic,french,english,chinese....
Missing sptip.dll.mui file? I recently had a system crash, and Windows automatically checked the C drive upon rebooting. I believe there was an issue with the sptip.dl.mui file. I cannot find such a file on my system now. So I am wondering: (1) do I need this file, (2) if so, where can I get it from a trustworthy source and (3) where does it go once I have it. 4 people had this question.