Something useful about fans.

To change the fan assenble is not an easy task, but unless you change the motherboard or the CPU there is no need to remove and change it.

If the fan gets old and dirty and doesn't work properly and doesn't cool the CPU you only need to change the fan and not the whole assembly. The heatsink never gets old, only the fan does it.

The fan is fixed to the heatsink with two or four screws. If you are able to find and buy the fan alone, buy it, if not buy the full package and remove the screws and then you have the fan alone. Then remove the screws from the fan in your CPU, remove the fan, put the new fan in its place and screw it to the heatsink. In few minutes without any headache you have a fresh and new cooling system.

Stupidity also evolves!