I know I have imported JPG files. All sound a bit erratic. Try this....

Open Control Panel and go into 'System'. Click on the 'Environment' tab.

Have a look at the system variable named "Non Microsoft Apps Behave Erratically'. If it is set to 'ALWAYS' then change it to 'NEVER'.

It cures so many problems - lol. Sorry, couldn't resist. :lol: