If you want to use PuTTY to connect to other computers, or use PSFTP to transfer files, you should just be able to run them from the Start menu.

If you want to use the command-line file transfer utility PSCP, you will need to run this from a Command Prompt or equivalent, because it will not do anything useful without command-line options telling it what files to copy to and from where. You can do this by just running the command 'pscp' from a Command Prompt, if you used the installer's option to put the PuTTY installation directory on your PATH. Alternatively, you can always run pscp.exe by its full pathname, e.g. "C:\Program Files\PuTTY\pscp.exe".

(Note that a Command Prompt that was already open before you ran the installer will not have inherited the update of PATH.)

Some versions of Windows will refuse to run HTML Help files (.CHM) if they are installed on a network drive. If you have installed PuTTY on a network drive, you might want to check that the help file works properly. If not, see http://support.microsoft.com/kb/896054 for information on how to solve this problem.