Recently we had a user report that when he tried to open excel file by double clicking, excel 2013 came up blank. After doing some troubleshooting, we found the adobe acrobat 2017 is causing the issue. It may have caused by Adobe PDFMaker com-addin in acrobat 2017. Once adobe acrobat 2017 is uninstalled, the issue went away. I am suspecting the recently windows update on the Microsoft office may have contributed. I have the older version Adobe acrobat DC 2015 did not have this issue. Can someone please look into this issue and release new fix/update to fix this problem?