Macbook won't boot past grey Apple logo.
Hello! My mother's unibody white MacBook will not get past the grey apple and spinning gear when you first boot up the computer. This was after she opened a link in an email from a friend who had her email compromised. Now I'm getting spam emails with the same link from my mother's hacked email, and her computer won't even get to the login screen. I took it to the genius bar only to be told it was likely HD failure, but the windows partition works without a hitch! What could this be? A trojan? Is there any way to retrieve data (really just pictures) before I attempt to reinstall OS X?
Thanks!
MacBook, Mac OS X (10.6.8)