Of course I can't prove this is what killed the machine, but nice freaking coincidence. At roughly 4:00 pm I get the helpful windows update notification. I see it's just an IE update queued up, and I only use IE for our weboutlook e-mail at work so I let it go. I postpone the reboot until 4:20 ish as my day ends at 4:30 today. Normal enough looking install, and reboot cycle. Starts to post, and *poof* "Missing operating system" Dell M4400 mobile work station - running vista pro - never had any issues before (even though I only tolerate Vista) I have a full HDD back up from about 3 weeks ago, and most of my work ends up on one of the file servers, or in the database but of course this week's worth is sitting on my 'desktop' (like most of us in a hurry that serves as convenient temporary work space) Hoping I can pull the hdd, connect to the usb-mult-cable I've got, mount the drive from one of the other pc's in the office and grab this week's work before I hand it in to IT who will simply nuke-burn if they can get the hdd to respond. I'm facing my first potential data loss since roughly 1998 a quick Google search didn't yield anything obnoxious re: this patch - anyone else have MAJOR issues with it?