Plugin Disable Change User Name released. 
What is a GWS-Webmaster?
A GWS-Desk Webmaster is person who manages a Joomla based website; mediator between web authors and system administrator - ensures that applicable standards such as HTML validity and link liveness are met, optimizes the web architecture for navigability, takes editorial responsibility for the content, quality and style of the site; finds, creates and installs tools to create web content and check consistency; develops and enforces the house style; liaises with graphic artists; provides first level user support.
Joomla’s flexibility and ease of usage makes it a popular CMS, which has resulted in a vast community and tons of extensions, only imagination can restrict the use of Joomla. Then why is Joomla sometimes operating with less speed than expected or slow? Joomla itself is not slow, one needs to tweak settings and use the available inbuilt options to boost up performance. Its up to the user to get the maximum out of joomla by tweaking settings and optimizing Joomla framework. Default Joomla has lot of potential to be optimized for speed and performance.
Often people require just a some specific support or just general support in finishing a project or purchase support valid for multiple sites. GWS-Desk provides this ad-hoc support on non Joomla core issues where needed. This relates for example to 3rd party software, extension setups and upgrades, etc. This is practical if you do not wish to purchase a support package but need a one-off assist.