These (Powershell 3.0) scripts will convert archived Security (auditing) logs. . If you run these at night, configure the advanced settings of your laptop to forbid automatic sleep/hibernation. Note that the field names for an evtx file are different than those you would use to query an existing (working) event log. Of the four scripts I test 'Function Convert-Logs3' has the best combination of optimized resource use and speed.
