by Kees_B - 4/28/12 2:29 PM
In Reply to: computer become hang quite often.(Hard disk problem) by lozeekhari
The answer above by ralphmark might well be correct.
In a recent thread http://forums.cnet.com/7723-19681_102-561754/laptop-freezes-randomly/ it seems the random freeze was caused by a bad stick of RAM. So that's a good starting point for your investigations.
You can download a free diagnostic (burn to CD yourself) from http://www.memtest86.com/