Why my Toshiba laptop suddenly shuts down by itself without warning?

Solutions:


1- Run an Antivirus, some viruses can keep the fan running for no reason, of other PC components performing tasks for no reason causing an inevitable shutdown.

2- Run an anti spyware

3- Upgrade the BIOS

4- The most important point. Some Toshiba laptops have a design flaw. The way the fan works it allows dust to come in and build up in front of the CPU unit causing it to build a strong wall of fluffy dust (Look in a pic). This big wall of dust stops the CPU from receiving an airflow from the fan to cool down, which cause it to stay hot and get hotter with time and inevitably do an Emergency shutdown to protect your PC (which is wise, i gotta say).... After researching how to fix my old Toshiba, I found out that this was the only solution since i have tried all the other solutions many times.... So, here how can fix it,

Locate where your CPU unit is on your laptop, you will need to unscrew one of the plastic covers at the back of the laptop. The CPU unit is in a Copper color (Look in the pic), usually it is covered with a thin metal cover, you will need to take this off first to be able to get access to the CPU unit. In some models this metal cover is glued to the CPU, you can easily (after unscrewing the metal cover screws) take it off. Make sure the Laptop is not connected to any power supply and it is OFF, if you just disconnected it from a power supply, I would recommend that you wait for a bit before attempting to touch the CPU (its always worth mentioning, coz if u electrocute ur self, i shouldn't be the one to blame, lol). After taking the annoying metal cover off you will be able to see the WALL OF DUST, in my case it was maaaassive (Look in the Pic), I actually blame the laptop for not shutting down earlier. You will need to take the CPU unit off (DO NOT TOUCH IT DIRECTLY), make sure ur hands are not wet, USE GLOVES, i would strongly recommend that. Take the CPU unit out and take the dust off try to clean around it, i used a hoover CAREFULLY to suck any dust that i can not see. Dont blow in it, coz that will push the dust further in, you need to pull any dust out. After you do all this put the CPU back and the cover, you can fit the metal cover back on as well. When you restart the PC, you will notice that the fan is alot quieter and it should not perform any other stutdowns (assuming you did it right and didnot break anything) I hope this helped. you might need to do this again every 2 years. Tips for avoiding that
- wipe any surface before u put ur laptop on it.
- Dont put ur laptop on beds, couches, carpets or any fluffy surface, coz the fan will suck that in.