Customer complained of slow machine and that the mouse pointer kept stopping on the screen for a second or two and then releasing. They also stated that the machine would make a loud whirring sound after being switched on for a few minutes.
The machine required a new hard drive (in this occasion a solid state drive) and a full physical service.
All data was securely transferred over to the new hard drive once the latest version of windows 10 professional was installed.
The machine ran approximately 10x quicker than before and was almost silent in operation after the service.