BSODs Completely At Random; Started After Recent Driver Updates

Basically, This computer has always been very stable, but now it seems to BSOD completely at random, and I'm at a complete loss as to why.

The time after which these problems started was when I went through and updated a host of drivers and the BIOS (all of which, having been neglected, were hideously out of date). I had also just installed a new Asus Xonar sound card.

Initially I thought it was going to be the new sound card, so I ripped that out and uninstalled it's drivers. Problem didn't go away. Tried switching off some of the integrated hardware the BIOS had turned on when it got updated (serial port, extra sata controller etc), and again, uninstalling the drivers for those. No luck. Had a look at the crash dumps in WinDbg, which weren't terribly helpful as they always pointed to "ntkrnlmp.exe" (which as I understand it is the very core of the Windows Kernel) and faulting process seems to be equally as random as the time it happens - over the five times it's happened, it's been steam, msn, skyrim and "System" twice. I tried reinstalling windows a-fresh (on my nice new SSD), install clean copies of all the latest drivers directly from the Motherboard manufacturer's website (and AMD in the case of the graphics): Low and behold! It still BSODs. All I can conclude is that ONE of these drivers is faulty somehow (or possibly the BIOS, I havn't tried downgrading that), but I can't work out for the life of me which one, and the few I've tried uninstalling have made no difference.

My only inkling is that it seems to happen most frequently when there is a disk access (like saving a game, or me moving some files around), so maybe it's to do with that?