For the last 2.5 years I have been running Win7 64 on a AMD 760G motherboard with a raid mirror consisting of two 2TB Seagate Sata drives. First year using a Gigabyte motherboard, which had onboard video fail, then moving the pair of drives to a MSI with same SB710 raid chip with little issue. Six months later one of the Seagates dropped out of the raid array without explanation, but it failed the long Windows based Seagate test and oddly would not show its serial number in the Seagate test, but I could see it in the Raid boot configuration screen. I left the failed drive in the system, dragging my feet to open it up and do all the RMA stuff, and bought a third same model ST3200542AS 2TB 5900 rpm drive. Installed and assigned to the array the mirror rebuilt without issue. Last week I noticed windows update had been turned off for the last year or so, and I turned it back on and ran all the critical updates with no apparent issues. New years day the system is running as a network media server, but nothing is going on, "maybe" I had a browser window open looking at the news on google, but I am on a second PC working when I hear the system beep and it restarts. At first it seems to sort of work, but I notice Avast antivirus is not running, and says something like its out of sync, but didn't use that word, but something like it. I open chrome to see if I can find some answers, don't, and over a about an hour the system crashes a few more times and eventually wants to run CHDSK (check disc however its spelled) which complains about 100 or so regions, which makes no sense to me as its a raid mirror array. I ran long memory diagnostics, no issues, and ran Dos Seatools which confirmed my bad drive from a year ago was bad, so I finally pulled it from the system and plan to send it off for RMA in morning, but my array is showing as fine. When I try to boot with it I get a no boot manager message and my Window7 install CD doesn't see any OS. I have an image from right after the motherboard swap, but the 2TB array was FULL of media, 26GB free space. What should I be trying next? Should I turn off the raid in hope that I don't fubar both drives and can rebuild it later once Win7 is sorted? Is there some standalone Linux that I could boot from a DVD rom and inspect the array contents?