Windows 11 23H2 upgrade causing performance loss and trusty Microsoft Defender may be why December 4, 2023 by admin Tweet Windows 11 version 23H2, much like some of the previous feature updates for Windows 11, is apparently causing performance loss, and it could have something to do with Microsoft Defender. Read more… Neowin Related Posts:Following Microsoft Defender, Avira now freezing…Windows 11 24H2 vs 23H2 in-place upgrade performance…Microsoft Defender update for Windows 11 or 10…Windows 11 23H2 upgrade likely possible on…Microsoft apparently canning P2P Win32 services on…