[Windows] Improve install instructions (#216)

* Improved Windows install instructions

Signed-off-by: Ben Clark <ben@benjyc.uk>

* Made changes according to review

Signed-off-by: Ben Clark <ben@benjyc.uk>

installation/windows.md

@@ -5,16 +5,68 @@ title: Windows
 
 {% include base.html %}
 
-# Installation on Windows
+# openHAB on Windows
 
-The openHAB runtime comes as a platform-independent zip file.
+The following instructions will guide you through the process of setting up openHAB 2.
-To install it, follow these simple steps.
-You will need to install Java if not already installed. Go to http://java.com to get it.
-Unzip the `openhab-offline-<version>.zip` to where it is intended to be running from, e.g. `C:\openhab`.
-Note that there can't be a space in the path, so it can't be in "Program Files" for example.
 
-Start the server: Launch the runtime by executing the script `start.bat`.
+## Prerequisites
 
-Point your browser to `http://localhost:8080` and you should be looking at the openHAB portal page.
+First, be sure to check that your system has the necessary [prerequisites]({{base}}/installation/index.html#prerequisites).
+
+The directory that openHAB is installed to must **contain no spaces**.
+On this page, we will be using `C:\openhab` as an example.
+
+## Installation
+
+The openHAB runtime is distributed using a platform-independent zip file. 
+To install it, follow these simple steps:
+
+1. Choose between the [RC (Release client) version](https://bintray.com/openhab/mvn/download_file?file_path=org%2Fopenhab%2Fdistro%2Fopenhab%2F2.0.0.RC1%2Fopenhab-2.0.0.RC1.zip) or the [latest snapshot version](https://openhab.ci.cloudbees.com/job/openHAB-Distribution/lastSuccessfulBuild/artifact/distributions/openhab/target/openhab-2.0.0-SNAPSHOT.zip) of openHAB2.
+
+2. Unzip the file in your chosen directory (e.g. `C:\openhab`)
+
+3. Start the server: Launch the runtime by executing the script `start.bat` and wait a while for it to start and complete.
+
+4. Point your browser to `http://localhost:8080`. You should be looking at the openHAB [package selection page]({{base}}/configuration/packages.html). 
+   When you've selected an appropriate package, this page will contain the [UI]({{base}}/addons/uis.html) selection screen.
+
+## Folder Structure
+
+Assuming a successful install, you will now have various folders inside `C:\openhab`:
+
+| Folder Path | Description                             
+|:----------- |:-----------
+| addons      | For adding new add-ons such as bindings
+| conf        | For textual configuration of openHAB
+| runtime     | Contains all the system files for openHAB
+| userdata    | Contains UI set configurations and settings for openHAB
+
+## Backup
+
+Make sure that you make regular backups of the **conf** and **userdata** folders, you can zip and unzip these folders too and from openHAB installations (even across most versions). 
+When you have a setup that you are happy with, it would be a good idea to make a backup of the whole `C:\openhab` folder. Which can be used any time after a failure.
+
+## Updating the openHAB Runtime
+
+There is currently no automatic update script for Windows. To update manually, download a later version of the openHAB distribution zip file and follow these steps:
+
+1. Stop the openHAB process if it is currently running.
+2. Backup openHAB as described above.
+3. Delete the following files from your existing install:
+ - `userdata\etc\all.policy`
+ - `userdata\etc\branding.properties`
+ - `userdata\etc\branding-ssh.properties`
+ - `userdata\etc\config.properties`
+ - `userdata\etc\distribution.info`
+ - `userdata\etc\jre.properties`
+ - `userdata\etc\profile.cfg`
+ - `userdata\etc\startup.properties`
+ - Any file in `userdata\etc` that starts with `org.apache.karaf`
+ - The `userdata\cache` folder
+ - The `userdata\tmp` folder
+4. Copy and paste the new `userdata` folder over your existing install, when prompted **do not overwrite existing files**.
+5. Copy and paste the new `runtime` folder over your existing install, when prompted **overwrite all existing files**
+
+## Starting openHAB as a service
 
 {% include contribution-wanted.html %}