Microsoft's February 2026 cumulative update for Windows 11, known as KB5077181, is generating a growing number of reports from users experiencing installation failures and system instability after applying the patch.
Although the company has not acknowledged any critical issues, multiple reports across Microsoft's Q&A forums reported a variety of error codes, including 0x800F0991, 0x800F0983, 0x800F0922, 0x80073712, and 0x80096004. In addition, DHCP errors have prevented internet access on some devices, leaving Wi-Fi connected but nonfunctional.
