I've had a couple of BSODs in the past week or so. One of them happened in the middle of playing a game, and cited 'memory management'. The other two happened when the computer was idle - once when I was at work, and once (just now) when I was asleep. The computer also recently ran a chkdsk on my C: drive on a restart (after I restarted because it was behaving a bit weirdly), which did not appear to come up with any errors. None of the bugchecks are the same - I have a 0x1a, a 0x7E and a 109. All three minidumps seem to cite ntoskrnl.exe. Can someone who knows what they are doing take a look and see whether there's a pattern to them or not?