Sounds about right. When you hit Alt/Prt Scr nothing happens visibly. But if you open MSPaint, for instance, you should then be able to click on Edit, then Paste, to paste the screen shot.
Prt Scr, or Alt/Prt Scr, just copies the screen, or Window, to your clipboard.
Understand to printscreen I need to do >Alt PrtScn< then paste, but Alt Prtscn seems to be inactive on my Microsoft Office keyboard... nothing happens. Any clues for a tech challenged newbie?