The mouse loading icon keeps flashing endlessly.

Hello, for a few days now, the loading icon of the mouse (small blue circle) has been perpetually active.
As if an application were continuously loading in the background.

This has led to a performance loss in absolutely all applications and games. Given that the PC itself is not very powerful, let's just say it's lagging.

I've searched a lot on the internet, but nothing works; the problem persists :'(

I ran a Malwarebytes scan, another adw cleaner, and attempted a defragmentation and database scan. As I speak, a Kaspersky antivirus scan (total security 2017) is in progress.

My PC is an Acer Aspire V3-771g laptop, and here are its components:

- i7-3632QM at 2.2 GHz with a boost to 3.2 GHz
- NVIDIA Geforce 740 M
- 8 Gb of RAM (Kingston, 1 stick)
- 1000 Gb hard drive at 7200 Rpm (practically new since it was replaced less than 3 months ago)

All running on Windows 8.1

One suspicion I had was the accumulation of dust in the fan and air outlet, preventing the computer from properly venting and causing component overheating.
But this seems unlikely to me since the problem appeared overnight.

I hope you can help me :)

P.S: I'm trying to attach an image of the mouse (found on the internet since I can't take a screenshot )

Configuration: Windows / Chrome 54.0.2840.71