I'm in the process of un-installing SQL Server 2005 and while doing this it informs me that Full Text Indexing is still running, reports services are running and the server is still running.

To fix this, open SQL Server Management Studio Express, connect to the server.
Right click on the node for the server, select STOP.

You can then start the process of un-installing

It will then throw the errors of full text indexing and report services - in these errors it will give a process id number.

Right click on the task bar and open task manager

Select the services tab

In the PID column, click on it to order by PID

Find the service that matches the PID number mentioned in the error.

Right click on the service and select stop service

Then click on the Retry button in the un-install programme