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.
MpSigStub.exe is a type of EXE file associated with Windows 7 Professional SP1 64-bit developed by Microsoft for the Windows Operating System. The latest known version of MpSigStub.exe is 1.0.0.0, which was produced for Windows. This EXE file carries a popularity rating of 4 stars and a security rating of UNKNOWN.