We're going to need a little more information. What is the model for your Toshiba laptop? Include an SKU if you can so we can see it's specs. In retrospect, my little brother yet has the HP ProBook 4430s that I'd restored for him, which he bought back in 2011.
If you take care of your laptop, ie., you give it a maintenance run, clean out the dust inside the laptop and change the thermal paste when you see temps rise, you should be able to run the laptop until it, basically, croaks. During your maintenance run, you can inspect each side of the laptop's motherboard and the capacitors inch by inch to see if anything is degraded or degrading. That would be a good indicator of a laptop that's trying to say goodbye.
Does your laptop have any BIOS updates pending?