I'm not sure what the right forum for this is, here, or in the Technical forum, but I figure it'll get read more here, so I'm posting here...

My computer (Windows 7 64 bit) was acting strange so I just ran a full virus scan.  It detected two viruses and one of them just happened to be in the blockchain.  It was detected in Bitcoin\Blocks\blk00129.dat.  Those of you running full nodes, especially on Windows, this would be a good time to run a virus scanner.  Avast caught this, I can't comment on any others.