Microsoft windows 11 unmountable boot volume issue january 2026 update – Breaking News & Latest Updates 2026
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Tom Warren
Microsoft confirms boot issues with its latest Windows 11 update.

Microsoft has confirmed that the boot failures with its January 2026 Windows 11 update are limited to “commercial” PCs and happened due to the December 2025 update failing to install and PCs being left in an “improper state.” It’s now investigating why PCs managed to get into this state in the first place. Microsoft’s first Windows 11 update of 2026 has been a mess.

Microsoft’s message to IT admins.
Microsoft’s message to IT admins.
Image: Microsoft
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