99% of most laptop problems are caused by your CPU cooling fans (these are the metal thingees that are next to your CPU) being blocked by dust. Most of the time, 6 months of everyday use will cause enough dust to collect in your cooling fans, which will either make your laptop run really slow or simply freeze up.
When dust collects in your cooling fans, your CPU fan will no longer work with you but actually against you, building heat on your laptop’s CPU, causing all kinds of havoc among frozen screens and boot up problems.
But don’t worry, it’s very easy t