Dell Laptop studio 1558 Shutting Down

Hi All ,

I am Having the same Issue as many of Dell users.I Have Purchased Studio 1558 i5 /500 gb/1 gb graphics machine 21 Nov,2010. But when i starting using Youtube Dailymotion for Videos.It stucks /Hangs for 2 -3 Seconds and gone ,shutt down . I am Checking lots of post regarding this issue.

Please Please let me know what should i do now .I am Very frustrated and Dissapointed to buy it .