When you select more than 15 files and right-click on them, most of the context menu items will be missing.
To display the context menu items when more than 15 files are selected, here is a quick registry edit.
Start Regedit.exe and go to:
Create a new DWORD named “MultipleInvokePromptMinimum”. To extend the limit to 20, set the value data for MultipleInvokePromptMinimum to 20 (decimal)
Exit the Registry Editor.
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Ramesh Srinivasan founded Winhelponline.com back in 2005. He is passionate about Microsoft technologies and he has been a Microsoft Most Valuable Professional (MVP) for 10 consecutive years from 2003 to 2012.