I solved the problerm with suggested use of http://www.nirsoft.net/utils/shexview.html and the problem was caused by context ConvertToPDF Class Yes Context Menu ConvertToPDFShellExtension 9.4.0.1491 ConvertToPDFShellExtension Foxit Software Inc.
I solved the problerm with suggested use of http://www.nirsoft.net/utils/shexview.html and the problem was caused by context ConvertToPDF Class Yes Context Menu ConvertToPDFShellExtension 9.4.0.1491 ConvertToPDFShellExtension Foxit Software Inc.