I need to download a file using putty. But trying psftp says that it isn't installed (even though I've downloaded and installed everything but puttytel).
For fsftp to work from the windows command line using the psftp command, the location of psftp needs to be in the path.
If you don't want to do that, you can run psftp from the start menu and it will open up in the command prompt for you. You'll have to use sftp commands like open, put, get, and quit to accomplish anything.