Hi and thanks for any help, td;dr is any advice for troubleshooting what could repeatedly cause corruption/loss of boot information on different SSDs (one new and definitely healthy). Over the past few months my Windows 7 installation has got increasingly unstable, seemingly randomly requiring checks of the disk (like after powering off unsafely) and sometimes needing to system restore entirely using recovery disks - generally after system updates - as it failed to boot. I assumed this was issues with the installtion as it had always been slightly dodgy, so did a clean install. This seemed to work until about two weeks later it failed to boot again - I can't remember the exact details unfortunately but from what I recall the installation wasn't even detected by recovery disks. I did another fresh install and this failed to boot while windows was installing old updates (so after 2-3 cycles from install). I decided that it must be my SSD failing/failed so ordered a new one, with hindsight seeing as all my data was intact on the drive this was a poor choice... This had been absoutely fine until today (so about a week, though probably only 2-3 power cycles after fully bringing windows up to date update wise) when it seems like the entire boot sector of the drive has gone. The drive wasn't recognised at all as being a boot one - checking using gparted on a linux live-disk the boot flag had gone. Resetting the flag the error I receive is bootmgr is missing. I've tried a couple of methods online to fix this but with no luck. When I received the SSD I checked it's health and it was OK - it still is OK checking it under linux. So I think the issue must be something hardware related (the motherboard maybe?). Unfortunately I've just got no idea where to even start. This was my first build that had been almost completely rock solid (hardware wise) for nearly 4 years (so please treat me like a beginner still) - full specs are below. The two HDDs I've got have never had any problems, but they've never had an OS on them. I think the most telling fact is that my files on the drive have never been damaged - I'm transferring from the drive now using an ubuntu live-disk. Thanks for any help! Specs: Asus P6TD Deluxe i7 920 6 GB RAM (can't remember exact details sorry) 2 x 5870 Vapor-X in Crossfire Samsung 840 Pro 256 GB (OS disk, new SSD, replacing a 128 GB Crucial) 2 x Spinpoint F3 1TB (no problems with these ever) Enermazx Revolution 850W (had failed last year under warranty, so ~1 year old) Asus Xonar DX (I apologise if this is in the wrong forum btw, I feel that as I'm 90% sure this is a hardware issue it belongs here rather than software) EDIT: I don't mind buying a new mobo/processor/ram if people think that's the issue it's a bit earlier than I'd planned to upgrade but not really a big issue.