Every couple of days, I hear a clanking sound as I try to boot up my laptop, followed by the appearance of this dialog box. Whatever I do with it, I hang my computer up. I suspect it's a virus.
So, each time, I wind up booting up in Safe Mode with Networking, and using System Restore. This allows me to open my browser normally. It lasts for a while -- multiple re-boots -- before I get the message, above, again. Oh, yeah, and usually my computer tells me that System Restore didn't work, but my computer works normally, anyway.
I've updated Malwarebytes, Avast! and Zone Alarm. I've scanned my system. I can't find anything wrong with it, but this snotsucker keeps showing up. What should I do?