Sticky W key

[Nova19]

My W key if pressed for long enough will keep on registering and saying it is stuck down when not and i can confirm its not physical and they key will sometimes stop working for like 5 seconds and then start working again. I have a HP Envy x360 convertible

[WAWood]

There is no way to repair or replace individual keys on a laptop keyboard.  You can look under the key with a flashlight to see if there is some sticky substance there -- but be sure NOT to pry the key OFF.  If you do that, it is likely to break the key mount and you will not be able to attach it again.