Click Start, and then click Control Panel.
Open Add or Remove Programs.
Select Microsoft SQL Server 2005, and then click Remove.
The Component Selection page appears. By default, the Remove SQL Server 2005 instance components check box is selected. Select the instance that you want to remove.
To remove the Workstation components, select the Workstation Components check box.
The Confirmation page appears, listing the components that will be removed. Click Finish to complete the process of uninstalling SQL Server Express.
You will see the System Configuration Check and Setup Progress pages as the uninstall process is completed.
To remove SQL Native Client, click Start, click Control Panel, and then click Add or Remove Programs.
Select Microsoft SQL Native Client, and then click Remove.
You will see a dialog box confirming whether you want to remove SQL Native Client. Click Yes.
SQL Native Client is removed from the list of Add or Remove Programs.