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Windows 11 refuses to copy, move, extract or delete a file, saying that its name or path is too long? The problem almost always comes from an old Windows limit: 260 characters for the full path of a file, folders included. This guide explains how to recognise it and work around it, from the simplest solution (shortenin
You want to delete, rename or move a file, and Windows 11 refuses, saying it is open in a program? Windows protects a file as long as a process keeps it open: this is not a fault, but you need to identify that process. This guide offers a progression from the simplest to the most technical, with Microsoft's free tools
Is Windows 11 denying you access to a data folder: an old drive connected to a new PC, the folder of a former user account, an external drive formatted as NTFS on another computer or a folder restored from a backup? This guide explains why File Explorer blocks access, what the Continue button really does, and how to re
You want to show your Windows 11 PC screen on a TV, a projector or another PC without a cable, but the display does not appear in the list, the connection fails or Windows asks you to plug in a cable? This guide starts from what you observe to find the cause, following Microsoft's support pages. Windows wireless projec
Microsoft launched the Windows 11 2026 Update (version 26H2) on September 29, 2026, and its status page has stated since October 28, 2026 that it is available for all eligible devices. Yet Windows Update still does not offer it to you? This guide helps you find out why, starting from the version installed on your PC, a
The Microsoft certificates used by Secure Boot, issued in 2011, expire in 2026. Windows replaces them with 2023 certificates, normally automatically through Windows Update. Since April 2026, the Windows Security app shows where this update stands. If it says "Not yet updated", shows a yellow badge or a red icon, this g
The Windows Subsystem for Linux (WSL) lets you use a Linux distribution such as Ubuntu directly in Windows. With WSL 2, the distribution runs in a lightweight virtual machine. If a virtualization component is missing, the installation or the first launch stops with error 0x80370102, which Microsoft documents as: "The v
Windows Sandbox opens a disposable Windows desktop, isolated from the rest of the PC, which is handy for testing software or a suspicious file: when it closes, all of its content is deleted. It relies on Hyper-V virtualization. When a requirement is missing, the option is absent or greyed out in Windows features, or Sa
An older game, a media player or another program closes without warning on Windows 11, at launch or as soon as it plays sound? If the problem started in late September 2026, it may be a bug acknowledged by Microsoft, linked to the AC-3 (Dolby Digital) audio decoding built into Windows. Microsoft fixed it with the Octob
This guide covers a Windows 11 display language (menus, Settings, File Explorer) that refuses to change: language missing from the list, a licence message, a change that doesn't apply, or an interface partly left in the old language. According to Microsoft, the main causes are a single-language edition of Windows, a la
Le partage de proximité de Windows 11 envoie des fichiers, des photos ou des liens vers un PC voisin par Bluetooth ou par Wi-Fi. Cette fiche couvre les cas où l'option est absente du menu Partager, où aucun appareil n'apparaît dans la liste, ou où le transfert s'arrête en cours de route. Elle suit les deux articles d'a
Cette fiche concerne Windows 11 lorsque des fichiers (PDF, images, vidéos, musique) ou des liens s'ouvrent dans une application que vous n'avez pas choisie, ou lorsque votre choix d'application par défaut ne tient pas. Elle s'appuie sur les réglages documentés par Microsoft. Problem Un double-clic sur un fichier ouvre
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