Password protected Excel file on usb drive file behaving strangely when clicked

Nothing unusual at first glance - a password-protected Excel file on a usb stick. Previously, put the stick in the usb port, double-click the file and enter the password to work on the file. Now though, when I put the stick in the usb port, the file opens (a copy) on just a single-click and the explorer window shuts down when the password is entered, meaning that I can't access the file contents. Very odd behaviour - tried a variety of usb sticks in various usb ports (same machine, same file). I checked, and File Explorer options are not set to open on single-click. Copying the file to the des

Question by SLS on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.