Windows 10 Cannot "send to ZipExcel spreadsheet in Windows 10..

[busybee]

I have lost the "send to zip" function for an Excel spreadsheet. I used the Copyright Office's spreadsheet format but when I right click on it for the "send to zip" function, the file becomes grayed out and "Not responding". No problem with other files -- just this one. I did change the title of the file to include the Case number. Could that be the problem?

Thanks for your help in advance.

 

[busybee]

Update: The problem seems to be spreading. I just tried opening other files (word, excel) with a double left click and many refused to open. Each grays out with red hourglass showing indefinitely. What's going on? I did try right clicking those same files and all seems to be functioning with the usual with "cut/copy/paste/send to" options. However, the only right click option for opening is as a PDF.