black screen desktop

[smilepercii]

hello. my laptop been like this since yesterday, after logging in, the desktop goes black screen. i cant access my files and whatever but i can access task manager.
SAMSUNG NOTEBOOK i3 @2.50 ghz. 4.00GB RAM

 

[basroil]

If you can take a photo of the task manager's "Details" section it will be very helpful for diagnosis.