Stop Print Job Logging In Event Log
Normally NT logs every print job processed by a server in that machine's application event log. Since for the most part these logs fall into the category of "data no one will ever look at," you can configure the spooler service to not make these log entries in the first place.
To suppress print job event log entries, add a new REG_DWORD value named HKLM\SYSTEM\CurrentControlSet\Control\Print\Providers\EventLog and give it a value of 0. As with all the other printing tweaks, this change won't take effect until you stop and restart the Spooler service.
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