Bitcoin core error: "Error: A fatal internal error occurred, see debug.log"

[btc123thatthere]

Hi
Was letting Bitcoin Core update, and it came up with this after a couple of hours:
"Error: A fatal internal error occurred, see debug.log for details".

Here it is in the debug.log file:

2017-04-11 16:40:22 Corruption: block checksum mismatch
2017-04-11 16:40:22 *** System error while flushing: Database corrupted
2017-04-11 21:27:22 ERROR: ProcessNewBlock: ActivateBestChain failed
2017-04-11 21:27:22 receive version message: /Satoshi:0.13.2/: version 70015, blocks=461452, us=106.68.111.251:58553, peer=166
2017-04-11 21:27:22 socket receive timeout: 17928s
2017-04-11 21:27:22 socket sending timeout: 18135s
2017-04-11 21:27:22 socket sending timeout: 18115s
2017-04-11 21:27:22 socket sending timeout: 17928s
2017-04-11 21:27:22 receive version message: /Satoshi:0.13.2/: version 70015, blocks=461453, us=106.68.111.251:58608, peer=172
2017-04-11 21:27:22 socket sending timeout: 17336s
2017-04-11 21:27:22 receive version message: /Satoshi:0.13.1/: version 70014, blocks=461455, us=106.68.111.251:58796, peer=178
2017-04-11 21:27:22 socket receive timeout: 17222s
2017-04-11 21:27:22 socket recv error An existing connection was forcibly closed by the remote host.  (10054)
2017-04-11 21:27:22 tor: Thread interrupt
2017-04-11 21:27:22 torcontrol thread exit
2017-04-11 21:27:22 opencon thread interrupt
2017-04-11 21:27:22 addcon thread interrupt
2017-04-11 21:27:22 msghand thread interrupt
2017-04-11 21:27:22 scheduler thread interrupt
2017-04-11 21:27:22 net thread interrupt
2017-04-11 21:27:22 Shutdown: In progress...
2017-04-11 21:27:22 StopNode()
2017-04-11 21:27:22 Corruption: block checksum mismatch
2017-04-11 21:27:22 *** System error while flushing: Database corrupted
2017-04-11 21:27:30 Shutdown: done

I don't know what it could be.
I did a full RAM test a few months ago that gave a full pass.
Can I delete the last few 'rev008xx.dat' files and restart it?

Thanks

[ranochigo]

The problem is quite obvious, your blockchain is corrupted. What you can do is to reindex or just delete the entire blockchain to start again. To reindex, start Bitcoin Core from command prompt/terminal.

[btc123thatthere]

Wonder what caused it hey

[btc123thatthere]

I restarted it and it's been updating for about 30 mins with no problems so far. (Fingers crossed.) 3 days behind right now.
If it still doesn't work I'll try the newest version 0.14.0 (I'm still running 0.13.2).

Failing that, is it okay if I delete the last few 'rev008xx.dat' files?

If that doesn't work I'll learn how to open the command prompt and tell it to reindex.
The absolute last resort will be to download the entire blockchain and start again - we only get 500kbyte/sec download speed here.. it took 2 weeks last time I did a fresh download! (About 4 months ago.)



Thanks