Physically clean the mouse, remove the battery and put it again and see if that helps. If you have to press the left click forcefully, there is a possibility of accumulation of dirt on the left mouse ...

Adding a bit of Windows 10 back into the mix sounds good to me.

You download a file from the internet only to discover that it isn't in the format you need. Your editing programs don't like it, the thumbnail isn't displaying ...

Select multiple files, right click on one of them and select Open. Or hit enter. It just depends on the registry entries for the file type whether they can be 'opened' more than one at a time. Oh, and ...