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Remote Desktop 0xC000000D: non-admin + Administrator protection, fixed by KB5127936

Microsoft documents a Remote Desktop failure for non-admin users connecting to hosts with Administrator protection enabled: connections may fail with error 0xC000000D and the message “The token that was passed to the function is invalid.” Per Windows release health (Windows 11, version 25H2), the issue is tied to the S

Thunderbird 159 / 153.6 ESR: do you already have the NTLM and message fixes?

Mozilla shipped desktop fixes on 27 October 2026: Thunderbird 159.0 (release) and 153.6.0esr (ESR). Security advisories MFSA2026-121 and MFSA2026-122 are rated high. Sourced recap: Thunderbird 159 / 153.6 ESR — NTLM and message leaks. Confirmed scope Displaying certain messages (external OpenPGP key, mailbox paths) can

"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

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