KB5021234Broken

AMD freezing hits 21H2 too, installs fail at 97%

System StabilityAMDInstallationStart Menu

What broke

The Windows 11 21H2 version of December’s Patch Tuesday carried the same AMD Ryzen random freezing issue as KB5021255. Systems would lock up for minutes at a time without warning. Installation failures hit at 97-100% completion. The Start menu broke with third-party customization apps. Microsoft achieved impressive consistency: the same AMD-specific bug shipped across both supported Windows 11 versions on the same day, doubling the blast radius.

Incident details

Update
KB5021234
Incident date
· Browse that year
Status
Fixed
Fix date
Page last updated
Severity
Broken
Affected
System Stability, AMD, Installation, Start Menu

Sources

  1. Windows Latest: KB5021234 incident report

Related Windows update incidents

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