Final answer:
Buying a used laptop or ordering flowers online are not actions that affect a computer's cooling system. Proper computer cooling involves adequate ventilation, clean components, and possibly extra cooling systems, and avoiding heat-inducing activities.
Step-by-step explanation:
The actions that are not recommended for keeping your computer cool do not include buying a used laptop computer at a garage sale or ordering flowers over the internet for your friend in a different city.
These activities are irrelevant to the computer's cooling process. Instead, keeping a computer cool typically involves ensuring proper ventilation, cleaning dust from fans and components, and possibly using additional cooling systems such as fans or liquid cooling solutions. Actions like using intense software that overheats the CPU without proper cooling, blocking the air vents of the computer, and exposing the computer to high ambient temperatures should be avoided as they can impede the cooling mechanisms of the computer.