A cleaner PC

It's still a few months until you begin spring-cleaning, but if your PC's insides are dirty, that could make for a sluggish system. Here's how to whip things into shape.

The Hassle: My PC overheats (the motherboard monitor beeps) toward the end of the evening, even though my home-office temperature is cool.

The Fix(es): I'll lay odds that your computer's case is full of dirt, dust and other crud. If you have a pet, the system is likely to be loaded with hair, too. Another bet: your PC sits on the floor, under your desk, gathering dust. Here's what to do.

Before opening the case, unplug everything - power cord, phone line, cable modem and Ethernet cables. After opening the case, touch the power supply to discharge any static and to ensure that you and the inside of your PC are at the same voltage. (Repeat this process every time you touch the PC's innards.)

Start by removing the foam filters, if your PC has any, on the fan vents. Gently clean the filters in a mild solution of dish soap and cool water, and let them dry before putting them back into place. (Better still: buy a foam air-conditioner filter, cut it to size, and replace all of the filters.)

Remove large clots of dust by vacuuming the fan vents from the outside of the case. However, be very cautious about vacuuming inside the case. Don't touch the motherboard or any add-in cards. At most, just suck away the dust that is lying on the base of your tower and on the bottoms of the system's empty drive bays. And avoid using brushes on components.

Alternatively, if the weather is dry and not too cold, carry the PC outdoors, and bring along a can of compressed air. I bought a can that had a foot-long hose attached; you can also buy tubing at a hobby store. The hose is perfect for clearing away dust throughout the case. It lets you hold the air can upright, as well; spraying the can at a tilt causes a wasteful blast of icy liquid propellant, and the resulting temperature change can damage components.

You may be tempted to spin the fan blades of the CPU's heat sink with a gust of air to clean them, but don't. The fan can't take the high rpm's. I know - I ruined one. Your best bet is to hold the fan and then blow with the air. Next, use a cotton swab with a weak alcohol solution to finish cleaning each blade. Carefully blowing the dust from between the blades of the heat sinks is even more important than cleaning the fan. Place the nozzle between the fan blades and along the open sides of the heat sink until no more dust flies out. Do not use an air compressor (like the kind you use to fill your tyres at a gas station) - they often contain a mix of oil and water.

Finally, put your PC on rollers. Raising your computer off the floor, even just six inches, will reduce the amount of dust that gets sucked into the fan vents. I use a small furniture dolly, available at hardware and home appliance stores.

Heat-monitoring apps protect your PC

Overheating is a sure sign your PC is dirty. But unless you have a tool to monitor your CPU, you won't have a clue if the system is nearing a meltdown. Here are a couple of programs I like. If one doesn't work, try the other. SpeedFan watches data collected by the system - the temperature and the fan rpm rate. This freebie displays the info in the PC's system tray and can sound an alarm or send a warning e-mail to you or someone else (not me, please). Get it at almico.com/speedfan.php. If you have an Intel motherboard, try Intel Active Monitor (intel.com/design/motherbd/active.htm). Not sure of your motherboard's brand? Get CPU-Z (cpuid.com/cpuz.php).

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Steve Bass

PC World
Show Comments

Cool Tech

Breitling Superocean Heritage Chronographe 44

Learn more >

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?