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Windows Bugged: Patch Fixes Cloud, Breaks Boot
26 Jan
Summary
- Microsoft issued an emergency patch for cloud storage issues.
- A separate bug prevents some Windows PCs from booting.
- The January update introduced numerous glitches requiring fixes.
Microsoft has issued an urgent out-of-band patch, KB5078127, to address critical bugs stemming from its January 2026 Patch Tuesday update. This patch specifically resolves an issue that prevented applications, including Outlook, from opening or saving files to cloud services like OneDrive and Dropbox.
The emergency update also incorporates fixes for remote connection problems and Secure Launch issues previously addressed on January 17th. Users encountering difficulties with cloud storage are advised to install KB5078127 and restart their systems.
However, the bug situation for Windows users is far from resolved. A distinct glitch, also linked to the January update, is reportedly causing a black screen and an "unmountable boot volume" error on a limited number of Windows 11 PCs (versions 25H2 and 24H2), rendering them unbootable.
Microsoft has acknowledged these reports and is investigating the boot failure problem, though a fix is not yet available. Affected users may need to employ Windows Recovery tools for manual restoration. This series of persistent bugs has raised questions about Microsoft's quality control processes.
