How to register a DLL in Windows

You may enter to an error like "Error MSSTDFMT.DLL Class not registered". In this case register the DLL as follows.

Open a command window (cmd.exe) running as an Administrator
(This is easiest to do if you create a short cut to cmd.exe, then click the shortcut with mouse right button - Run as administrator)

Go to the folder where the DLL is located eg. "cd \windows\syswow64"

Register the corresponding DLL eg. "regsvr32 msstdfmt.dll"