Problem with lenovo g560 0679 NoteBook.

Hello, I have purchased Lenovo g560 0679 it's Configuration given below:
1. Operating System: Windows 7 (64-bit)
2. RAM: 4 GB
3. HDD: 320 GB
4. Processor: Dual-Core
Now I told about the problem is after running around 30 minute the cooling fan creates noise for 1-3 minutes then stop. After some time again same problem recycling and it is annoying me much. Is there any way to stop this stupid noise?
