Device Issues– Category –
Solve peripheral device problems such as USB devices not being recognized or Bluetooth not connecting. Learn how to update, delete, and reinstall drivers using Device Manager.
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[Independent Verification] Will the Secure Boot issue brick your graphics card in 2026? We asked official Microsoft support directly.
Recently, in the PC build and gamer community, there has been talk that "the old Secure Boot certificate (Microsoft Corporation UEFI CA 2011) will expire in June 2026, and that PCs may be affected by graphics cards..." -
[Win11] Bluetooth disappears after Windows Update and how to fix it
After applying Windows Update in Windows 11, it has been confirmed that Bluetooth suddenly stops working or the Bluetooth item disappears from the settings screen. -
[Solved] Mouse and keyboard not working issue in WinRE fixed with KB5070773
Microsoft has recently released a fix for a serious issue that has been plaguing many Windows 11 users: USB mice and keyboards becoming unresponsive in the Windows Recovery Environment (WinRE). -
Mouse and keyboard not responding in Windows Recovery Environment (WinRE)? The cause is KB5067039
[For English Readers] This article explains a bug where the mouse and keyboard do not work in the Windows Recovery Environment (WinRE) after a Windows Update... -
ASRock B550M Pro4 Motherboard BIOS Update Method and Notes
The PC I use is a BTO PC purchased from PC Koubou, and it has an ASRock B550M Pro4 motherboard. I'm using an ASRock B550M Pro4 motherboard... -
[Warning] BIOS manipulation can make your PC unbootable? Three measures to prepare for Secure Boot updates
One day, when you turned on your PC as usual, a warning message appeared and Windows 11 would not start at all... Such a nightmare situation was not caused by a virus or malfunction, but by a legitimate security... -
What is a chipset driver? How does it improve your PC's performance? How to update and check it in Windows 11
Have you ever experienced a PC running slowly even though it has a high-performance CPU and large memory capacity? PC performance is determined by the CPU, graphics card, and other key components... -
[Solved] Keyboard, Wi-Fi, and Bluetooth all gone after Windows 11 update? What to try
After updating to Windows 11, I'm experiencing serious problems, such as my keyboard not responding and Wi-Fi and Bluetooth not connecting... -
Stuck in BIOS Loop? Windows Won't Boot - Why and How to Fix it
When I turn on my computer, an unfamiliar English screen (BIOS/UEFI) appears, and even after saving the settings and restarting, the same screen appears again... This phenomenon is called a "BIOS loop"... -
[October 2025] Windows 10 support ends! Should you continue using it? Or upgrade to Windows 11? Explaining your best options
On October 14, 2025, support for Windows 10, a long-time favorite of many users, will finally end. According to StatCounter's statistical data (as of July 2025),... -
What causes the "Unsupported Graphics Card" error and how to fix it?
This time, I would like to explain the causes of the "Unsupported Graphics Card" error and how to resolve it. Unsupported Graphics Card This error is mainly caused by the graphics driver... -
How long does a desktop PC's CMOS battery last? Guidelines for replacement and precautions
This time, I would like to introduce the lifespan of a desktop PC's CMOS battery and guidelines for replacement. A CMOS battery is a small coin-shaped battery (button-less) mounted on the motherboard.