I changed the Passwords in AD Users and Computers, and then again in IIS, but the event viewer still reports that the identities for Enterprise Server and Portal pools are invalid.

Can you check the users are members of the local IIS_IUSRS group?

They were all members of IIS_IUSRS

Hello,

Its hard for me to suggest anything else as we have covered all reasons the app pool would stop especially without any detailed errors logged.

We can take a look through paid support and connect directly to your server. If you are interested in this please use the contact button at the top of the page.

Kind Regards,

Trevor Robinson

After staring at the error for an hour, I noticed that it spoke of the "Log on as batch job" policy, so I went into group policy editor and added IIS_IUSRS, to no avail. I'm going to uninstall and reinstall, though my hypothesis is that the installer isn't made for Domain Controller environments.