Is this when the PC is idle or in use? - If it is idle then it is a little high. Have you changed any of the fan speed settings in your BIOS?
I would download some monitoring tools such as Real Temp and keep an eye on it if it is idle.
If the problem persists, I would consider opening it up and checking that you have the right amount of thermal compound between the CPU and heatsink as too much/too little can have this effect on your system.
I have no problem with temperature for now, but the cooler is quite loud. I cannot change the cooler, warranty isn't recognized because the temp is within limits. Should i buy a new cooler, and do you have some recommendations?