Changing the windows installation doc to include instructions how to login

using putty instead of CMD

Signed-off-by: Krasimir Georgiev <support@vip-consult.co.uk>

Docker-DCO-1.1-Signed-off-by: Krasimir Georgiev <support@vip-consult.co.uk> (github: SvenDowideit)

docs/sources/installation/windows.md

@@ -57,6 +57,14 @@ Let's try the `hello-world` example image. Run
 
 This should download the very small `hello-world` image and print a `Hello from Docker.` message.
 
+# Login with PUTTY instead of using the CMD
+
+boot2docker generates and uses the public/private key pair in your %HOMEPATH%\.ssh directory so to login you need to use the private key from this same directory.
+
+The private key needs to be converted into a format that putty can use so  for this purpose you can use <a href="http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html">puttygen</a>
+Open puttygen.exe and load the private key from %HOMEPATH%\.ssh\id_boot2docker  (File->Load) ,
+then simply click : Save Private Key.
+You can use the saved file to login with putty using docker@127.0.0.1:2022
 
 # Further Details