here is the rest of the log
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Your best option is probably to try running the -reindex command and see if that fixes your issue a bit. Unless you can run/have run any hard drive testing software that has found a problem in the hard drive, then this error may likely continue.
Also, do you have ANY antivirus installed, there were rumors that at least one block in the main chain got deleted from the blockchain by antivirus because someone decided to add a virus signature to a block (not to be malicious intentionally but probably to see if it caused AV issues from the blockchain itself - which was proven).