AURORA R4 CPU FAN FAILURE

Hi,

My Alienware Aurora R4 was received at home on décember 6, 2012

Worked fine until February 24, 2013, where the "Alert ! CPU Fan failure ... Strike F1 to continue F2 to run Setup utility"  happened for the first time at boot.

I hit F1 and the PC ran withour any problem, no special noise, quiet as usual.

Next days were fine, until March 29, where this happened again. Same on march 30 and today also april 1.

I checked eveything I could with Alien autopsy

What should I do to solve this problem ? This is quiet ennoying, and I am scared to hit the Poweron button each morning now.

I am not a gamer, I bought this PC because I make a lot of pictures editing and Videos.

Excuse my English, but I am french and lives in France.

Thanks in advance for your help.

Michelle