パソコン・ソフトIs it #N/A even though there is a value in VLOOKUP? 5 reasons why you can't see it and how to solve it with IFERROR/XLOOKUPAn easy-to-understand explanation for Excel beginners of 5 reasons why #N/A appears even though there is a value in VLOOKUP (invisible spaces, mismatched data types, incorrect search method settings, etc.) and how to solve them using IFERROR, IFNA, and XLOOKUP.2026.03.03中村 健太
パソコン・ソフトDid your computer freeze and unsaved data disappear? How to restore unsaved Excel, Word, and Notepad files [Windows 11]Did your computer freeze and your unsaved Excel, Word, and Notepad data disappeared? Explains the restoration procedure using the automatic recovery function for each app. We will also introduce the version history of OneDrive and 5 preventive measures to avoid crying again.2026.03.02中村 健太
パソコン・ソフトAre certain keys not responding on your laptop keyboard? 5 causes and how to deal with it yourself [Windows 11]We will explain in an easy-to-understand manner the 5 reasons why certain keys on a laptop keyboard do not respond (filter key, clogged dirt, driver problem, NumLock, physical failure) and how to deal with each in a Windows 11 environment.2026.03.027 min中村 健太
パソコン・ソフトMouse cursor moves but you can't click? 6 causes and solutions you can try now [Windows 11]We will explain in an easy-to-understand manner the six reasons why the mouse cursor moves but clicks do not respond in Windows 11 (Explorer freezes, driver problems, click lock settings, control software interference, poor USB connection, corrupted system files) and possible solutions, including emergency workarounds that allow you to operate using only the keyboard.2026.03.01中村 健太
パソコン・ソフト6 causes of momentary stutters and freezes during gaming and solutions you can try now [Windows 11]The cause of momentary stutters or small freezes during gaming on a gaming PC is often due to Windows 11's notifications and background processing. We'll explain six solutions you can try right now, including Do Not Disturb mode, disabling Xbox Game Bar, and checking your game mode.2026.02.28中村 健太
パソコン・ソフトPC won't start after Windows Update? 5 ways to recover on your own from the recovery environment (WinRE) [Windows 11]PC won't start after Windows Update? We will explain 5 ways to recover on your own from the recovery environment (WinRE), including uninstalling updates, restoring the system, and booting into safe mode, with step-by-step instructions.2026.02.288 min中村 健太
パソコン・ソフトCan't see images even if you connect an external monitor to your PC? 7 reasons why it is not recognized and solutions you can try now [Windows 11]Explains 7 causes and solutions for troubles where the screen does not appear or is not recognized when an external monitor is connected to the PC. From checking cables to Windows settings and resetting graphics drivers, we will introduce you in easy order.2026.02.27中村 健太
パソコン・ソフトWill the secure boot certificate expire in June 2026? What to check and what to do before your PC stops bootingWindows Secure Boot certificates will expire in June 2026. If you leave it unattended, there is a risk that your PC will not start up. We will explain in an easy-to-understand manner how to check if your PC is okay and four solutions.2026.02.27中村 健太
パソコン・ソフトCan't you add more memory to your laptop? How to identify onboard memory and 5 points to check before purchasingWe will explain how to avoid the mistake of buying a cheap laptop but not being able to add more memory. Learn how to identify onboard memory, check points before purchasing, and the memory situation in 2026.2026.02.276 min中村 健太
パソコン・ソフト6 reasons why Windows 11 Explorer freezes or becomes unresponsive and solutions you can try now [2026 edition]Explains the 6 main causes and solutions for problems where Explorer freezes or becomes unresponsive in Windows 11. We will provide an easy-to-understand explanation of how to delete Quick Access history, deal with Windows Update issues, resolve shell extension conflicts, and repair using SFC/DISM commands, along with the latest information as of February 2026.2026.02.27中村 健太
パソコン・ソフトDid OneDrive move files without permission? Reasons why the desktop and documents are saved to OneDrive and how to restore itExplains the reason why desktop and document files are moved to OneDrive without permission in Windows 11, the steps to stop backup and return files to local, and how to set up to prevent recurrence.2026.02.26中村 健太
パソコン・ソフトIs your computer slow to start? How to organize Windows 11 startup apps and make them super fast [2026 edition]The reason why Windows 11 starts slowly may be "too many startup apps installed." We will explain to beginners how to organize unnecessary apps in three stages: Settings app, Task Manager, and Registry, and dramatically shorten startup time.2026.02.26中村 健太
