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Event ID 1000 rundll32.exe_aepdu.dll

Posted by Maarten Van Driessen on

While doing my morning check of our monitoring system I came across a strange issue…Two of our servers had been unavailable during the night, this had also happened the night before. Time to dig a bit deeper!

Both servers are domain controllers running Server 2012 R2, no updates were installed in the last few weeks and nothing had been changed either. Pulling up the event log of both servers, I found the exact same event logged on both machines at the time they were unavailable to our monitoring system.

After I quick search, I found out that aeinv.dll is part of the Microsoft Customer Experience Improvement Program (CEIP). If you’re signed up to the CEIP, which you are by default when you install Server 2012 R2, three scheduled tasks will run each night to upload your anonymized date to Microsoft.

  • AitAgent
  • Microsoft compatibility Appraiser
  • ProgramDataUpdater

We had the unavailability after the first and third task ran.

Luckily you can easily opt out of the CEIP by opening Server Manager, going to Local Server and clicking on the link behind Customer Experience Improvement Program.

There you will see that the radio button, Yes, I want to participate in the CEIP is selected. Click on No, I don’t want to participate and click OK.

You’re now opted out and the scheduled tasks will no longer run.

UPDATE 11/07: Turns out that just opting out of the CEIP does not actually prevent the scheduled tasks from running. In order to fully disable them, you need to disable them through the task scheduler or, even better, disable them through PowerShell

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