Understanding Why Your Computer’s Fans Keep Running After Shutdown

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Understanding Why Your Computer's Fans Keep Running After Shutdown

Ah Hao: Ah Feng, my computer shuts down normally when I click to close the computer from the start menu, but the CPU fan and power supply fan inside the case keep running and cannot turn off by themselves. What’s going on? I touched the case and felt there is still a certain temperature, indicating that it is still dissipating heat, and the power consumption seems not small. Over time, the electricity bill will be huge. Can you help solve this?

Ah Feng: There are many reasons for this problem, including hardware failure, hardware overheating protection, mismatches between hardware power management and operating system power management, BIOS settings, etc. If these issues have been ruled out, it may also be a system setting issue.

Ah Hao: Setting issue? Where to set it? How to operate?

Ah Feng: The operation is simple, the steps are as follows:

1. Right-click on the desktop and select display settings

Understanding Why Your Computer's Fans Keep Running After Shutdown

2. In the pop-up window, select power and sleep

Understanding Why Your Computer's Fans Keep Running After Shutdown

3. In the right window, select “Additional power settings”

Understanding Why Your Computer's Fans Keep Running After Shutdown

4. In the pop-up window, select “Choose the power button’s function”

Understanding Why Your Computer's Fans Keep Running After Shutdown

5. In the right window, find “Turn on fast startup (recommended)”

Understanding Why Your Computer's Fans Keep Running After Shutdown

Ah Hao: Ah Feng, this “Turn on fast startup (recommended)” is grayed out, cannot be modified!

Ah Feng: Yes, at this time, you need to click “Change settings that are currently unavailable” at the top of the window

Understanding Why Your Computer's Fans Keep Running After Shutdown

6. After clicking, the items under “Shutdown settings” can be changed.

Understanding Why Your Computer's Fans Keep Running After Shutdown

7. Uncheck “Turn on fast startup (recommended)”

Understanding Why Your Computer's Fans Keep Running After Shutdown

Ah Hao: What is this Turn on fast startup (recommended)?

Ah Feng: To put it in Microsoft’s words:

During a cold boot, the boot loader constructs a kernel memory image by loading various parts of the Windows kernel files into memory and linking them. Next, the kernel configures core system functions, enumerates devices attached to the computer, and loads drivers for them.

In contrast, fast startup only requires loading the hibernation file (Hiberfil.sys) into memory. The time required for fast startup is usually much less than for a cold boot.

This just speeds up your computer’s boot time.

Ah Hao: Oh.

Isn’t it interesting?

Ah Hao: Not bad, not bad

Alright, the above is the entire content of “New WPS interface grayed out and cannot be edited, prompting ‘You are currently in guest mode, log in to activate more features and services’, solution.

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