Why does my keyboard take sooo long to type?

my keyboard is acting up. idunno why but on most sites it does. on facebook, google, but oddly no this site. The problem seems to be tht its processing the words so slow to mak it look like this -> "he hw re yu doin" and i hav to type extra carefully. is this because i have a virus? (a user account recently got a virus, but ive delete the user. it hasnt spread to any other user it seems. im alright with computers.)