I cannot capture a speed test image and put it in the Pictures folder

Why, I have NO idea. I have done it before, although not in a long while. I have read, and read, and reread the various instructions on line, none of which do not do what they say they will do, at least not for me. Would some of you nice folks kindly provide me with the correct method of accomplishing the task,

I did manage to create and save an image of a speed test on my wife's computer, and following the instructions, put it into the Pictures folder on my computer. Why that image was relatively easy to create and save and then send, etc.; why there and not here, is to me unknown.

Why do I need to do this: It is one of several things I need to submit so that Netgear can figure out why my router is not working properly, an artifact that I have finally intuited may be responsible for many of the computing problems I have been encountering.

Gramercy, from Medieval French, "Thank You,"

With the speedtest results on the screen.
Press ctrl + prtsc
Open paint or any other image tool
Press ctrl + v
Save