This feature is designed to ignore brief or repeated keystrokes, which is the exact opposite of what you want in gaming. Go to Settings > Accessibility > Keyboard and ensure Filter Keys and Sticky Keys are toggled off.
Windows has built-in accessibility features that can actually slow down your inputs.
For advanced users, tools like LordOfMice's HIDUSBF can sometimes force a higher polling rate on certain devices, reducing reporting time from 8ms down to 1ms. 3. Hardware & Connection Fixes
Open the Control Panel , search for Keyboard , and set your Repeat delay to "Short" and Repeat rate to "Fast". This makes held-down keys register continuously without stutters. 2. Boost Your Polling Rate