[Shasown]

If your laptop is out of warrantee. Make sure it is switched off and not plugged in, open it up get a vacuum and give the cooling fan a good clean, be careful not to touch any of the other compnents if it was switched off recently. also clean the vents that way.

Periodically get a decent program to see what's running in the background, how many errors you have in the registry etc and maintain it that way, saves overworking the hard drive. If need be copy what you want saving onto a backup then reformat the whole thing and then reinstal your operating system and other programs you regularly use.

Lastly, the best advice when using laptops is to sit it on either a commercially made mount which has a cooling device in built or at the very least place a board, as large as the laptop on your lap and sit the machine on that.