There seems to be some type of virus on my Mac and I cant seem to figure out where it is or where its coming from. A few times a day i'll click on something and it'll open a new tab with virus information and popups that take a while to close. It also pops up with a "Mac Help" number that it says to call, but i'm not stupid and I know its a scam. It's pretty annoying and I want to get rid of it asap, any suggestions would be appreciated, thanks.