Hello DIY Tech Gurus,

My laptop (a popular brand, about 3 years old) has started sounding like a jet engine! The fan constantly whirs loudly, even when I'm just browsing the internet, and the bottom of the computer gets uncomfortably hot. I'm almost certain it's packed with dust and needs a good cleaning, but I'm nervous about opening it up.

I've searched for tutorials, but some are for specific models, and others involve re-applying thermal paste (which seems a bit advanced for me right now).

Can someone provide a universal, step-by-step DIY guide focusing only on safely opening the laptop and cleaning the fan/vents? I need to know the easiest way to get the dust out and quiet the noise without damaging any internal components.

Specifically, I need practical advice on:

1. Preparation: What should I absolutely do first (like battery removal, grounding myself) before I even touch the case screws?
2. Best Tools: Is canned compressed air the best option, or is a soft paintbrush safer for getting dust off the fan blades? How should I hold the fan so it doesn't spin while I use the air?
3. Access: Are there any general tips for finding the hidden screws or safely prying open the plastic casing without breaking the clips?

I am ready to perform this maintenance, but I need clear instructions to feel confident! Any basic video recommendations for the cleaning process would be a bonus!