All has been well with my used macbook pro 2008. I went home for the holidays, used the library wifi... no problems come back home hook everything up again & now it seems like something has taken over my web browser. I have an ad/ coupon sidebar that i didnt have before..... I alos notice I have to click on some things 3 times before i can get to it. another window pops up everytime I click. Then Ive been recieveing some sort of non apple mac security web page pop up. & some of the pages are very hard to stop or remove. Ive cleared all cookies, search history, ect..... I even installed the free bitdefender virus scan app. still the same. my main web browser is chrome, then firefox, then opera. I dnt use safari. any help will be appreciated.