Windows 8 has a cool feature that will auto suspend apps that you close, however you can also close Metro apps via the task manager if you have to force quit them.
What are the Metro Applications?
Microsoft is full of surprises. In the developer’s preview version of Windows 8, Microsoft introduces Metro user interface. The applications running in Metro user interface is called Metro Applications. Previously there was Aero user interface. In Windows 8, Metro resides along with Aero. One of the first things you will notice in Metro applications is, there is no Close button. Even Alt+F4 doesn’t work here.
After opening a few metro style applications and then opening the task manager you will notice that some processes have the status of “Suspended”. Windows will automatically kill them later when Windows notices u already finished using that application. To save system resources, Windows suspends the metro style application when it is not used, but once a user switches back it is almost instantly the application starts working.
Introduction of “Suspend an application” feature is no doubt a good thought by Microsoft. But there are problems. Suppose you have opened several metro applications. Assume the number is 50. So, it becomes very annoying all those 50 applications are listed in Task Manager in “suspended” state while you are not using any of those applications.
So, the only probable way to terminate a metro application is to terminate is from Task Manager. To know to close Metro Applications, read the instruction below.
2. Right click on the specific metro application you want to close.
3. Click on End Task option.
There should be a Quick option to stop the opened metro apps. Hope in future Microsoft will think about this and will provide updates regarding this issue.