Shutdown Problem - Computer shows force logoff window

[thepath4u]

i was facing problem while shutting down my PC, since few days. it always shows the window of force log off. simultaneously i found in between my work system get hang and the task manager also become irresponsible. I don't no what to do please any body help me..

 

[Brett928S2]

specs ?

 

[compunewbie]

specs ?

VAIO E series.i3 processor,2 GB ram. Windows 7 ultimate 32 bit