It's probably no secret for anyone how to select multiple files in the Windows GUI. Ever since time immemorial, this has been done by pressing the CTRL key and clicking on the necessary files. Even users of file managers, for example Total Commander, who have more convenient means at their disposal, sometimes have to allocate files in a standard way, for example, in order to attach several files to a letter. This is not very convenient, especially if you have to choose from a large number of files. It is worth thinking, to click wrong - and you will have to create a set again. Maybe not everyone knows that Vista has noticeably improved this interface, but for some reason they preferred to improve the improvement from their users.
Go to any folder, for example, in "Computer". In the menu, select “Organize” (Organize) → “Folder and Search Options” → the “View” tab (View), where we enable the “Use check boxes to select an item” option.
Now, next to each file, when you hover the mouse over it, a “checkbox” will appear, which will allow you to mark the file or, on the contrary, remove it from the selected group with the mouse. And in the header of the “Name” column, a “main checkbox” appeared, by clicking on which we select all the files in the current directory (as with Ctrl + A). The old technique remains valid. IMHO, so much more convenient.

or so

Enjoy!