High CPU or GPU usage causes the fan to run at high speed. 2. Dust accumulation affects the airflow of cooling, making the fan louder. 3. The background program uses the hard disk excessively and causes noise. Windows computers are usually caused by three reasons: First, running a high-load program will cause the CPU or GPU temperature to rise, and the fan will accelerate to run, which will generate noise. You can view the resource usage through the task manager and turn off unnecessary applications; second, long-term accumulation of dust on the fan and heat sink will hinder the air circulation, and regular cleaning or repair of compressed air can alleviate this problem; finally, when you hear intermittent clicking or rotating sounds, it may be that the Windows index, update or antivirus software background operation takes up hard disk resources, and the index can be paused or scan time can be adjusted. Users who use traditional hard disks can also consider upgrading to a solid-state hard disk to reduce noise.
Your Windows PC might be loud for a few common reasons, and most of them are pretty easy to figure out once you know what to look for. The noise usually comes from either the fans spinning faster than normal or the hard drive working harder than usual. Let's break it down.

High CPU or GPU Usage is Making Fans Work Harder
When your computer runs demanding programs — like games, video editing tools, or even just too many browser tabs — the CPU or GPU heats up. In response, the fan spins faster to cool things down, which makes more noise.

You can check what's using your system resources by opening Task Manager (Ctrl Shift Esc). Look at the CPU, Memory, and GPU tabs to see if something is maxing out. If you see a process using 80% of any resource for no obvious reason, that could be the culprit.
To reduce this:

- Close unnecessary apps or background processes
- Update drivers and software — sometimes performance issues are due to outdated code
- Avoid running too many heavy apps at once
Dust Buildup Is Restricting Airflow
Over time, dust gets sucked into your PC through the vents. If enough builds up on fans or heat sinks, airflow gets restricted, causing components to heat up faster — and again, that makes the fan spin louder.
If you're comfortable opening your PC, you can clean it with compressed air. Just make sure to ground yourself first to avoid static damage. If you're not confident doing it yourself, take it to a local repair shop.
A few signs that dust might be the issue:
- The noise gets worse over time
- The bottom or sides feel unusually hot
- The laptop feels hotter than usual even when idle
Background Programs Are Using Your Hard Drive
If you hear occasional loud clicking or whirring, especially when you're not doing anything intense, your hard drive might be working overtime. This often happens when Windows is indexing files, running updates, or scanning for viruses in the background.
To check this:
- Open Task Manager
- Go to the "Performance" tab
- Click on "Disk" — if usage regularly jumps to 100%, something is causing heavy disk activity
You can try pausing Windows indexing or scheduling virus scans during times when you're not using the PC. Also, consider upgrading to an SSD if you're still using a traditional hard drive — they're much quieter and faster.
Basically, a loud PC is usually trying to tell you something's off — whether it's overheating, working too hard, or just needs a little cleaning. Fixing it doesn't always mean replacing parts; sometimes it's just about managing what's running and keeping things physically clean.
The above is the detailed content of Why is my Windows PC so loud. For more information, please follow other related articles on the PHP Chinese website!

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