Server 2008R2 System Crashes when a non-local user logs in

I have a Server2008R2 box that is rebooting at "Applying Registry Settings" whenever an active-directory user logs in. If I remote in as myself it crashes, if I log in from the console as myself it crashes, but I can log in remotely and locally as the local admin account.

The stop error is:

The computer has rebooted from a bugcheck.  The bugcheck was: 0x000000d1
(0x0000000000000000, 0x0000000000000002, 0x0000000000000008, 0x0000000000000000).

A few seconds later in the logs show 27 different services failing to start on reboot.

Any ideas?

Thanks.

These sorts of BSODs are very hard to troubleshoot. If the fault uploader to Microsoft isn't giving you anything useful, it gets worse.

In this case DRIVER_IRQL_NOT_LESS_OR_EQUAL is a pretty generic error. A lot of the Microsoft KB articles that touch on a stop-code of D1 also link to hotfixes, but figuring out which one might help you will require digging into the dump files.