Bitcoind (v0.9.2) crashed without an error.
The last lines of the debug.log are:
2014-07-15 04:03:13 UpdateTip: new best=0000000000000000254ad6360f213075ec51b80209d4ec432b84f25c165151d1 height=310788 log2_work=79.720254 tx=42550544 date=2014-07-15 04:02:37 progress=0.999999
2014-07-15 04:03:13 ProcessBlock: ACCEPTED
2014-07-15 04:03:57 receive version message: /Satoshi:0.8.1/: version 70001, blocks=308362, us=, them=5.44.169.75:8333, peer=5.44.169.75:51840
2014-07-15 04:04:15 receive version message: /bitcoinseeder:0.01/: version 60000, blocks=230000, us=, them=0.0.0.0:0, peer=178.18.90.41:52823
2014-07-15 04:05:09 socket recv error An existing connection was forcibly closed by the remote host. (10054)
2014-07-15 04:05:11 ResendWalletTransactions()
2014-07-15 04:06:00 UpdateTip: new best=000000000000000033cd828bf6b8662f424f165def4ccd6d3bf0aa86c89a4680 height=310789 log2_work=79.720361 tx=42550658 date=2014-07-15 04:05:56 progress=1.000000
2014-07-15 04:06:00 ProcessBlock: ACCEPTED
2014-07-15 04:06:32 Unable to open file c:\bitcoin\data\blocks\blk00157.dat
2014-07-15 04:06:32 ERROR: ReadBlockFromDisk : OpenBlockFile failed
Any ideas?