my host name is dhnsjj91. i can see this by running ipconfig/all. where the heck did this come from? when I am in windows and I press ctrl alt delete, it says, you are logged on as dhnsjj91/newyawkr. I did not put the dhnsjj91 in there. is this a bot or some kind of spy device? how do i disable it.? I already disabled the guest account, which was turned on, but not by me. :-( Thanks for your help.
Additional Details
10 months ago
my daughter also uses it sometimes. She hasn%26#039;t changed anything. Also, when i first got it, it did not say dhnsjj91 when I pressed ctrl alt delete, it just said, newyawkr. i think i have been hacked but I am wondering for what purpose and what to do about it, also, does that person or persons still have access to my computer?