Secure Boot does not significantly slow down a PC's overall performance. However, it may slightly increase the boot time in some cases, but the impact is generally minimal and mostly noticeable during system startup rather than regular use. Some users have observed a reduction in latency or boot time when disabling Secure Boot, but this difference is typically only a few milliseconds and does not affect daily system responsiveness. Secure Boot is primarily a security feature designed to prevent malicious software from loading during startup, and it doesn't impact system performance once the operating system is running. In summary, Secure Boot might add a small delay to boot time but does not slow down PC performance during normal operation, and its security benefits generally outweigh the minor boot time trade-off.
