Hey Estrelo,
I've split your response into its own thread so that we can focus on the problem that you are experiencing. If you are viewing this message from an email notification, please open
this link to view your threads which will display the newly created thread.
Are you receiving any error messages when you try to open the Metro style applications from the Start screen? Is so, please include an example message in your next reply.
Also thank you for posting your feedback, we want to make sure we get the right info including your log files. Can you also submit feedback using the Windows Feedback Tool from the Connect Site associated with your Windows Developer Preview program?
If you’re an MSDN subscriber, the information on how to join the Connect program is included on the download page where you installed Windows Developer Preview. There’s a link to the Connect site and an invitation code that you can click
on to join using a Windows Live ID account. If you’re not an MSDN subscriber follow this limited use
link to join the Connect program and then follow the steps
here.
Look forward to hearing back from you.
Steven