Image: Microsoft Buggy fixes stopped from landing on hundreds of millions of devices In other words, most end users will never see the regression!" "While these devices would still require a reboot, in most cases we have identified and published a rollback before most end-user devices would have had the chance to even install the update containing the issue. "Devices connected to Windows Update or Windows Update for Business are notified of this change and it takes effect with the next reboot. "When Microsoft decides to rollback a bug fix in an update because of a known issue, we make a configuration change in the cloud," the company explained in a blog post published Tuesday. Now, almost one year later, all fixes shipped via Windows Update to devices running Windand later are using Known Issue Rollback containment. Microsoft has been using Known Issue Rollback to rollback computers affected by problematic bug fixes to a working state since late 2019.Ī fully working version of KIR was introduced in Windwhen all the components began working together as a functionally complete system. KIR is not used to revert problematic security updates because it would lead to older code being reintroduced, usually more vulnerable and, potentially, containing more exploitable security bugs.Īs a Windows 10 servicing improvement, Known Issue Rollback allows Microsoft to revert single and targeted bug fixes once critical regressions are detected.
Microsoft has shared details on Known Issue Rollback (KIR), a Windows 10 capability used to revert buggy non-security fixes delivered through Windows Update.
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