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"sudo" not recognized or disabled on Windows 11: causes and solutions

Sudo for Windows lets you run a command with administrator rights from a terminal opened normally, for example sudo netstat -ab. When the command does not behave as expected, the message shown almost always points to the cause: Windows too old, feature not turned on, feature blocked by a policy, or an unexpected run mo

Preview of downloaded files blocked in Windows 11 File Explorer: cause and solutions

File Explorer's preview pane no longer shows your downloaded PDFs, documents or HTML files, and instead says: "The file you are attempting to preview could harm your computer. If you trust the file and the source you received it from, open it to view its contents." This is neither a virus nor a bug: it is a protection

Copilot key instead of Right Ctrl on Windows 11: cause and solutions

On many laptops and keyboards released since 2024, the manufacturer replaced the Right Ctrl key (or sometimes the Context Menu key) with a Copilot key. As a result, your Right Ctrl shortcuts no longer work, and a screen reader that relied on that key becomes awkward to use. In 2026, Microsoft added a Windows 11 setting

Hyper-V missing or cannot be enabled on Windows 11: causes and solutions

Hyper-V is the hypervisor built into Windows: it lets you create virtual machines without extra software. Microsoft states that there is no Hyper-V download: it is an optional Windows feature, which only appears if the edition and the hardware allow it. When Hyper-V is missing from the list, greyed out, or Hyper-V Mana

"Microsoft has blocked macros from running" in Office: cause and solutions

You open an Excel, Word or PowerPoint file received by email or downloaded, and a red security risk banner says: "Microsoft has blocked macros from running because the source of this file is untrusted". This is not a fault: since 2022, Office on Windows blocks VBA macros in files from the Internet by default, because t

SSH connection fails with OpenSSH on Windows 11: causes and solutions

Windows 11 includes OpenSSH as an optional feature: the client (the ssh command) to connect to another machine, and the server (the sshd service) to accept incoming connections. When the connection fails, the cause is almost always one of four things: a missing component, a stopped service, a closed firewall, or a publ