The computer's fan is making loud noises

The first thing you could attempt is to take a can of compressed air try to blow at an angle across the computers heat vents to try and remove as much debris as possible from the inside of the fan recesses without taking the computer apart. If this does not work you will have to take your laptop apart and look at the fan for any defects or obvious reasons the noise would be occurring during the laptops running. Last resort is to replace the fan or clean out the entire inside of the computer with a compressed air can. A great link for fan replacement can be found here: https://forum.ts.fujitsu.com/forum/viewt...

If you have a LifeBook S series 760 down load the last bios update 2011 this solved my problem after trying various postings online.

Ray

Put it on a hard surface so that it's properly ventilated. I don't know much about that laptop, but I do know that when the fans are covered, it prompts the fan to go off as it will start to get warm.

You can purchase a fan/flat surface type thing for your laptop, it has it's own fan that you can turn on to reduce overheating.

I use one for my Mac as a flat surface and it saves me a lot of worrying.