In Microsoft Windows, when you select multiple files (by holding the control or shift button) the right click context menu appears to be shorter than normal right click context menu. A closer look may show you that the right click context menu for multiple files are missing few options compare to the menu which comes for a single file.
Microsoft published an article on how to force Windows to show those options back again when you select multiple files.
The following registry value may be modified to choose the number of files that may be selected while maintaining the context menu options.
Name : MultipleInvokePromptMinimum
Type : DWORD
Default : 15 (decimal)
Changing the number (how many files) value there would force the Windows to display the hidden options.