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On Windows, perf printed "load average ?": load_average runs sysctl or reads /proc/loadavg, and Windows has neither. The warning for a busy machine could not print, so a run over budget on a busy machine failed, where macOS and Linux warn and exit 0. perf --deep printed no memory rows, because rss_mb runs ps. --help did not list --deep. On Windows, perf now reads GetSystemTimes twice, one second apart, and its first line gives the cores busy on average over that second where macOS and Linux give the load average. It warns above three quarters of the cores, as on macOS and Linux: with all 32 logical processors of a test machine kept busy, the line read "cores busy 32.0" and a run with three budgets over exited 0. The --deep memory rows give the working set (GetProcessMemoryInfo). Both calls use winsafe 0.0.29, which Cargo.lock already lists for the desktop app; the CLI depends on it on Windows with the kernel and psapi features. The help lists --deep and says that a run over budget on a busy machine exits 0. perf's report on macOS and Linux does not change.