You can update your PS Vita System Software using Wi-Fi, PC or a PlayStation 3 system
A new system software update (v1.65) for PSV (PlayStation Vita) is now available making a few changes to the user interface. You can now disable the notification alert messages that indicate when friends sign in, messages are received and other activities. To disable these alerts, got to [Settings] > [Sound & Display] > check/uncheck [Notification Alerts]. Additionally, Notification alerts will now display for five seconds instead of three seconds.
In addition, 'After 10 Minutes' has been added as an option in [Power Save Settings] > [Auto Standby], and an arrow will indicate when new activities are available in LiveArea. Also, Caps Lock is now supported by the on-screen keyboard - simply double-tap the Shift key to enable it.