Installation and Upgrade > Installation and Configuration Guide - Update Existing Installation > Updating an Existing Installation > Bringing Your System Back Online
  
Bringing Your System Back Online
If you are applying a point release, you must complete the steps described in the Windchill Read This First before proceeding. If you are only adding a new product to your existing installation, proceed.
You must restart your PTC HTTP Server, servlet engine, and Windchill servers.
To start your method servers, enter the following command from a windchill shell:
windchill start
Be sure that you have rebuilt the JAR files so that changes are incorporated. This is done automatically for you when you install a maintenance release or point release using the Complete installation type; otherwise, you can manually rebuild JAR files, as described in the Windchill Customization Guide.