Essential Security Features Affecting Performance

Modern operating systems often include robust security features that, while vital for protection, can introduce performance overhead, particularly noticeable in demanding applications like gaming.

The top 3

  1. Virtualization-Based Security (VBS) in Windows: Virtualization-Based Security (VBS) in Windows 11, enabled by default, can reduce gaming performance by approximately 5% to 25% in CPU-intensive games, with some titles like Microsoft Flight Simulator seeing 10-15% improvements when disabled.
  2. CPU Microcode Updates for Vulnerabilities: Patches addressing CPU vulnerabilities like Meltdown and Spectre can lead to performance degradation, with estimates ranging from 5-30% depending on the chip and workload, though some reports suggest a 0-4% impact on CPU performance.
  3. Disk Encryption's Performance Overhead: BitLocker, particularly software-based encryption enabled by default in Windows 11 24H2, can reduce NVMe SSD sequential read speeds by 40-45%, potentially slowing a 3,500 MB/s drive to under 2,000 MB/s, impacting boot times and application launch speeds.

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