System getting hanged frequently while playing a movie

sandhya.eash Posts 4 Registration date Sunday July 29, 2012 Status Member Last seen March 29, 2013 - Mar 29, 2013 at 01:29 AM
I have a lenovo G570 laptop,with windows7 os.
if i leave my system ideal for sometime it is getting stopped(hanging like) for few minutes frequently ,especially while playing a movie and even when playing songs in media player. it gets stopped displaying "not responding " message in title bar,and it starts running after few seconds.. can any u please give a solution for my issue..?