| Metric | x64 Native (Intel/AMD) | ARM64 via Emulation (SEP) | Native ARM64 AV (e.g., Defender) | | :--- | :--- | :--- | :--- | | Boot time impact | +4 seconds | +8-10 seconds | +3 seconds | | ZIP file scan (1GB) | 12 seconds | 19 seconds | 9 seconds | | CPU during idle scan | 8% | 22% | 5% | | Kernel driver stability | Excellent | Moderate (rare BSODs reported) | Excellent |