I've used the open source telnet/ssh client Putty for many years to manage remote machines. Recently I was using a blog post to setup a virtual machine to be used as a web server. The instructions were complete, but the commands were long and difficult to retype. I wanted to copy and paste but I couldn't use the Ctrl-V to paste in Putty because the key sequence is just sent to the connected computer. It turns out copy and paste is extremely easy in Putty, but you need to read the help file. Copy and Paste works with the mouse. Select any text with the left mouse button and it is immediately copied in the Windows clipboard. Right-Click to paste the contents of the clipboard into Putty. Here are a few bonus tips: [more]
Shift-Insert will also Paste into the Putty window.
Shift-Right-Click will bring up a context menu in the Putty window. The top menu item is Paste.
Double-Click will select the whole word below the mouse cursor and copy it to the clipboard.
Triple-Click will select the whole line below the mouse cursor and copy it to the clipboard.