When you try to open unassociated file the following dialog appear.
when you click see all option following dialog appear
When you click
look for app on web it opens internet explorer in metro style and gives the suggestion program associated to that file.
How to Enable delete confirmation dialog
Right click on recycle bin and select properties.
Now check the
Display Delete Confirmation dialog.
Hidden Thumbnail Feature
When you move your cursor extremely left side you see thumbnail, through this thumbnail you can access previously opened programs.
Click and drag the
Thumbnail to right side, the thumbnail will enlarged and also you switch to another opened application.