Microsoft Releases Emergency Windows 11 Update to Fix Intel Driver Performance Issues

Microsoft released an out-of-band Windows 11 update (KB5121767) to correct performance and power regressions tied to the Intel IPF driver impacting a subset of devices—primarily certain Dell systems—lifting a temporary block that had prevented those machines from receiving the July 2026 security update. The cumulative release includes prior fixes, a servicing stack update (KB5120102), and AI component updates; Microsoft classifies the fix as targeted for affected hardware, and administrators and affected users are advised to test and deploy or install the update as appropriate.