How to Remove CPU Cooling Fan

easy way to remove clutter cooling fan from the mother board. you will see 4 screws, you need to turn anticlockwise till you see a click, do it for all the 4 the same way, before doing this ensure computer power cord is unplugged, you are grounded and remove the fan power connector from the mother board. I got a new CPU cooler fan for 400 Rupees.