Hello All .........
Firstly, thanks for noticing this New Thread (my first).
Secondly, I find that I'm prohibited/unable to open any new or saved Excel files.
I double click. There is a hint of a flash of the opening Excel logo(?) which disappears and I receive a pop-up, informing me that,


"There was a problem sending the command to the program"



I've found that after pinning Excel to the Task Bar, opening it from there, choosing 'File' > 'Recent', I can choose a recently(?) used folder, then an Excel file and it will open just fine.
But it's a royal pain in the coit.
I would be grateful for any any light that anyone can shine on this problem.
Jim