Hey guys, I've been working with this PC for a few months now no problems. But i just got home from a LAN that i went to and when i tried to boot for the first time i got a "Missing operating system error".

The first thing i figured was that i must have knocked a drive unplugged during the transport of my PC. I opened the pc up but couldnt find anything wrong. I also noticed something else...usually when i start up it will show a quick splash screen of my hard drives that i have connected...now it just says it cant detect any. The weird thing is when i go into BIOS they are still listed under the SATA devices.

Any tips? Im hoping this is just an easy fix and i didnt physically damage anything while carrying around my PC

Here are some specs:

Windows Vista Ultimate

Asus Maximus Formula

2 x 150 GB Western Digital Raptors in RAID 0

UPDATE: I tried using the repair function on the Windows disc. I couldn't find my operation system on the list of OS's to repair, even after loading the drivers i used to set up the raid. So i just hit next and tried the "Startup Repair" function anyway. It worked for around 15 minutes before saying it could not repair the operating system.

NEVER run a windows repair on a drive that says missing os/missing system registry ect. you must repair the file structure or else cause damage to os.

to do this boot your vista cd you then need to get in a command prompt and run chkdsk /r

It is possible that you changed sata configuration before first Vista install and your bios reset 2 default. try 2 change sata settings in bios. that a first think i do.

It is possible that sata configuration was different form default before you first installed your Vista and your bios reset 2 default. try 2 change sata settings in bios. and chkdsk /r . hope it not 2 late . And please install Acronis or Ghost, it saved my ass more than one's.