Not sure if this is the right place for this question.
I have had alot of trouble with my soon to be ex roommate doing some stuff on my computer that no adult should be doing. I installed k-9 site blocker and then I started noticing that site that are blocked are being opened and navigated, I have changed my password a few times but it has done no good. I think he has installed a key logger on my computer in order to get the passwords. Is there a way that I can find out if he has done this? I have used them in the past and know that they are well hidden... I really need some help with this y'all.. I am at my wits end with all of it and I don't want to get in trouble for what he is doing. Is there a way I can clean my computer from all this "smut" that he has accessed, aswell?