Listed below are the steps required to uninstall a program in new Windows 8 Developer Preview Operating System.
Click the Start button to launch the Windows 8 Metro Style.
Click the Control Panel option on the Metro Style. In the Control Panel Window, scroll down and click the More settings option.
This would launch the Control Panel Window available in Windows 7/ Windows Vista. Now click the Uninstall a program option under Programs section.
In the Programs and Features window, select the Program that needs to be uninstalled and click the Uninstall option.