One of the Feature Sites We Ale Windows 8 it is and The notifications display mode Each time one happens event (Installations of applications, fall, Security messages etc.). The notifications are displayed maximum 3 at the same time, and have that Default display 5 minutes, which can become a problem when several consecutive applications are installed, because this can prevent other notifications to be displayed more important.

Although notifications may be manually closed by users, most of them probably would prefers to reduce the notifications display time to make sure they will not miss something important.
How can we reduce notifications display in Windows 8?
- in Start Screen, open Charms menu and click on Change PC Settings

- Select Ease of Access, and in the right panel, below Show notifications for, select the desired range from The Drop-Down menu (eg you can select the minimum range, of 5 seconds).

- the modification will have Immediate effect, and the important notifications will no longer be "in danger" to be overlooked.
STEALTH SETTINGS – Change the interval for displaying notifications in Window 8