on my computer when ever im typing some time randomly in the middle of of one of my words like lets say the word microwave The C is randomly Capitalised, i know computers automatically capitalise words at the begining of a sentence but it does this with a random letter in the middle of a word im typing.

And when im typing all of a sudden the Word up is insterted into my sentence.

like im just saying "hows your day" then the computer insters the word up "Hows up up your day" it just randomly inserts that word into what im typing randomly.