DESKTOP COMOUTER 2H221F is your computer. Unless there is another PC on the locfal network.
What happens when you click 'OK' ?
Does it show you a directory and ask for a file name?
Is so, just do it. Remember the name of the file. I will be somewhre in you computer.
Otherwise, read over the documentation and do not scn from the printer. Instead, print up yu photo editor and scan from inside that program.
Did that help any?