Most Mandarin varieties have four tones. The final stops of Middle Chinese have disappeared in most of these varieties, but some have merged them as a final glottal stop. Many Mandarin varieties, including the Beijing dialect, retain retroflex initial consonants, which have been lost in southern dialect groups.
explorer.exe is a system process that is needed for your PC to work properly. It should not be removed. Check your system now to identify unused processes that are slowing down your computer. The explorer.exe file is an executable file for Windows Explorer.
So for the next couple days, I'm going to give beginners an overview on Windows Explorer. For starters, let's not confuse Windows Explorer with Internet Explorer--Microsoft's efforts to the contrary. The latter is your Web browser, of course, but Windows Explorer is the operating system's file and folder manager.