Putty's scrollback buffer is quite useful in displaying
the results of previous commands or for copying a session to the clipboard for pasting in another program.
If you want, you can clear the scrollback buffer before entering a particular remote command, so that when you select, copy, and
paste the scrollback buffer, only the results of your recent remote command are stored in the buffer.
Just right-click the Putty menu bar in your current session and choose "Clear Scrollback".