SEPM 12.1.2 MP1 install rolling back on Server 03 R2

I upgraded our SEPM install to 12.1.2 MP1 and started having problems with the Embedded Database service starting afterwards, so I uninstalled all of the Symantec products, but now I can't get SEPM installed again. The installation gets to "Waiting for LiveUpdate to finish..." and then rolls back the install. I've tried removing registry keys manually as well as the symantec folders on the C: and G: (installation) drive.

Any ideas? I need to get this solved asap. I've uploaded the SEPM_INST.log.