Hi All, I've been suffering from this issue for a couple days and have been entirely unable to figure out how to fix it. I ran MB on Monday night and restarted my computer (It had taken care of 1 threat) and upon reboot explorer.exe will not start. Every other program seems fine (even memory hogs like Photoshop and video games). However, when trying to start explorer.exe through command prompt I get an error that says 'Program too big to fit in memory'. Unfortunately, I (without knowing) didn't have system restore enabled, so I had no restore points to go back to. I'm hoping someone will have some advice on how to solve this issue. Thanks so much, B