Hello! I have a Macbook Pro Early 2009, Mac OS X Mountain Lion and I am facing the following problem: After downloading (from the official website, not from App Store) and while installing ClamXav, I tried opening Safari, but it said that some necessary plugin was missing and that I had to re-install Safari, even though 1 minute before that it was functioning normally. The menu bar became unresponsive and I couldn't even force quit the ClamXav installation. I pressed the shut-down button and when I turned my MBP on again, it wouldn't log in as an administrator (note: I installed ClamXav as an admin), but it would look as if it were loading and then freeze, so I had to hold down the shut-down button again. However, I could log in as a Guest User and that's how I uninstalled ClamXav using AppCleaner (though I think it only deleted the app from the guest user account) and later ran Disk Utility to Repair Permissions. No luck. I tried logging in in safe mode, but I still wasn't able to log into my account. I left it loading for about 40 minutes and it never logged in. Any suggestions? Thanks in advance!