My assistant has a macbook pro and just a couple of days ago he was scammed out of $300 by fraud apple support. The called him up convincing him to connect to his computer and to buy some sort of gift card so they can "fix" his computer. Anyways, $300 gone and a valuable lesson - he did called apple (the official apple and confirmed they never did call - he was scam). The apple technician, the official apple, did connect and found nothing wrong with the computer. My question to the experts is, since he is no expert and doesn't even know what the scammers did while connected, what areas should he check in his computer? Any advice in a Post-Scammed situation is appreciated.