A routine January Patch Tuesday update left a significant slice of Windows users temporarily unable to rely on core productivity workflows after the January 13, 2026 cumulative update (KB5074109) introduced regressions that broke parts of classic Outlook and disrupted remote access for some...
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appx packaging
boot issues
cloud pc
cloud sync
enterprise ititadministrators
kb5074109
known issue rollback
microsoft store
out-of-band
outlook
outlook pop
patch management
patch tuesday
security updates
uninstall error
windows 11
windows updates
