data-filter-autofilter-cant't get just one column!

Hello!
Well, OF COURSE, i selcted the column…but no success, the function went for all the columnes!
Is there another way to SELECT column?
I just MARKED it, as we usually do if we want to, for example, copy and paste the text…(the marked column was hell blue, other columnes were not, but the fuction I haveshoosen wored for ALL THE COLUMNS, not just that one I marked!)

Is there another way to select a column, or should I think about my pc being attacked by a virus?
Many thanks!