when it type enter it suddenly type plus sign

[Windows 10]

so, lately i have this problem on my hp laptop that whenever i type enter it just randomly ghosting plus sign then when i click the backspace it will stop. I know you guys will recommend reinstalling the drivers, updating the drivers, the windows and etc. but i've already done everything of that we also tried the disconnecting the wire inside then it actually disappear and i though it was already fix but after some day it began to happend again. I also noticed that when my touch pad and cursor suddenly lag, i know it will type plus sign repeatedly again when i try to search on something. this

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