Sai Kung Computer

24/01/2026

很多拿電腦到鋪維修的客人都會講＂昨天才用得好好的，今天就開不到機＂。其實，電腦是很精密的器材，平時缺乏對它的關顧，包括放在多灰塵的地方，因電腦散熱風扇會將灰塵抽入機內導致電腦過熱。我通常回覆是要時常備份自己重要資料，否則後悔莫及。

Many customers who take the computer to the store for repair will say, "I just used it well yesterday, but I can't turn it on today." In fact, the computer is a very sophisticated equipment, and there is a lack of care for it at ordinary times, including placing it in a dusty place, because the computer's cooling fan will attract dust into the machine, causing the computer to overheat. I usually reply that you should back up your important data from time to time, otherwise you will regret it.

15/01/2026

在網上看到這個post 值得分享。

https://www.facebook.com/share/1aLzFWiE2Z/?mibextid=wwXIfr

🔐 The Windows Boot Process — From Power-On to Desktop

Ever wondered what really happens after you press the power button on your PC? 💻
This visual breaks down the Windows boot process step by step, showing how your system comes to life behind the scenes.

🔍 What’s happening under the hood?

Power-on triggers firmware (BIOS/UEFI)

Hardware checks (POST) ensure everything is ready

Boot media and EFI System Partition are located

The OS kernel is loaded into memory

Core services, drivers, and startup processes begin

Finally… the desktop appears 🎉

💡 Why this matters for IT & Cybersecurity professionals:
✔ Helps with troubleshooting boot issues
✔ Critical for understanding malware persistence & bootkits
✔ Essential knowledge for system admins, Blue Team & SOC analysts
✔ Builds strong fundamentals in OS internals

📌 Whether you’re an IT student, cybersecurity learner, or system engineer — mastering the boot process means mastering the system.

05/01/2026

再講為什麼電腦的供電系統。一般電子器材都不能用交流電直接供電，要由交流電轉為直流電，現在普遍用開関型變壓供電或稱電子牛，內裏元件長期在高頻下作用，故電子元件容易損壞。故無論是座枱機及手提電腦都要選用品質良好的電子牛以使供電穩定亦避免發熱至火警。

Let's talk about the power supply system of the computer. Generally, electronic equipment cannot be directly powered by alternating current. It needs to be converted from alternating current to direct current. Now it is generally used to use switching power supply to supply power to computers.The internal components work at high frequencies for a long time, so the electronic components are easy to damage. Therefore, whether it is a desktop computer or a laptop, good quality electronic supply should be used to make the power supply stable and avoid heat and fire hazard.

03/01/2026

2026年希望提供多一些使用電腦要留意的事情。目標是不會突然死機找不到資料，沒有電腦用。今日講下一般電腦壞的主要零件，變壓器或稱火牛。點解，下回分解。

25/08/2025

25/08/2025

30/11/2022

Although replacing cmos battery is not so hard for me, but it sometimes hiding in place that you need extra effort.

08/11/2022

Gaming computer is not just serve the function of entertainment but also give hardware developers to enhance their capabilities.

03/11/2022

The malfunction of switching power supply is the most significant fault of electrical appliances.

16/03/2021

Repair