FC26 PC Crash – Anti-Cheat Invalid Pointer Read (c0000005, movntdqa)
System: PC – AMD Ryzen 7 2700X, MSI B450 Gaming Plus (latest BIOS), 16 GB Corsair Vengeance LPX RAM at 2666 MHz (1x16GB), NVIDIA GPU driver 552.22, Windows 11 Pro 10.0.26200 x64. Reproducibility: Occurs consistently during normal gameplay with no mods, on average 3–4 times per day, minimum twice, tied to engine AI and anti-cheat routines. Description: During gameplay FC26 crashes to desktop with no visible error. WinDbg analysis shows an access violation inside the anti-cheat virtualization routine ANTICHEAT_VIRTUALIZE_CODEMARKER_SHIELD while executing an SSE instruction movntdqa on an invalid memory pointer. Technical details: Exception code c0000005 (read), faulting instruction movntdqa xmm0, xmmword ptr [r8], faulting module FC26!ANTICHEAT_VIRTUALIZE_CODEMARKER_SHIELD+0x230e53, invalid pointer r8=0x412d5813f0. Stack includes ANTICHEAT_VIRTUALIZE_CODEMARKER_SHIELD followed by SoftMaxNormalize indicating AI computation affected by anti-cheat. Registers show deterministic invalid pointer access. Minidump and ecxr context are attached. Observations: Crash occurs inside anti-cheat memory virtualization, not GPU drivers or user code, and is independent of overclocking or RAM instability. Request: Please investigate anti-cheat memory virtualization causing invalid pointer access and crashing legitimate players, particularly when interacting with AI SoftMax routines.
