inputs.conf?
You should include one of these keys: http://docs.splunk.com/Documentation/Splunk/6.4.2/Data/MonitorWindowseventlogdata#Create_advanced_filters_with_.27whitelist.27_and_.27blacklist.27
so yours might be something like:
blacklist1 = Message=%.(run_autostat|proteus_prod_archive)..log%
depending on where the string is in the message field, in might also be
blacklist1 = Message=%^.(run_autostat|proteus_prod_archive)..log$%
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