A user complains that their computer takes too long to boot and applications load slowly. Which component upgrade would provide the most noticeable improvement?

For a computer that takes too long to boot and loads applications slowly, the most noticeable improvement would come from replacing the HDD (Hard Disk Drive) with an SSD (Solid State Drive). HDDs rely on spinning platters and mechanical read/write heads, which are inherently slow. SSDs, conversely, use flash memory and have no moving parts, offering significantly faster read and write speeds. This drastically reduces the time required for the operating system to load and applications to launch, making the entire system feel much snappier.

• A: A larger monitor only affects screen size, not performance.
• B: A faster processor primarily improves computational speed, but slow boot/load times are often I/O-bound, meaning storage speed is the bottleneck.
• D: Adding more USB ports provides connectivity but has no impact on system boot or application loading speed.