I take the view that whenever anyone goes to the trouble to write something that can help now, next week or in 5 years time it will come in useful. Over the UK winter the "tool" I used most was a McDonalds wooden stirer to clear out heatsinc vents in conjunction with a vacuum.

No quick fix for laptops other than dismantle and remove the plug of fluff accumulated in the air vent.

Poor ventilation has caused more trouble than anything else on all sorts of machines from * year old XPs (God bless 'em) to 3 grand (pounds that is, not dollars) year-old gamers.

Agree with startup and browser fixit options in addition to defrag.

Not too proud to fix anything no matter how old it is.