My bad not to insist that I meant only those kind of windows, reghakr, sorry.
I agree that is often very useful to copy and paste elsewhere some information from OS's windows as specifications, error messages etc. You could also use the snipping tool but it takes considerably more time and probably you have to type the text anyway.
Ok, reghakr, now I feel more at ease since it is not only in my case. I have also known of that psr tool which seems to me quite interesting. Thanks for the link to SIW, actually I've just uninstalled cpu_z and was about to install SIW for that task.
Many, many thanks for your patience.