Well, I'd never thought to use the task scheduler before, it sure is nifty. It also caused problems... after creating the task, checking the run with highest privileges and rebooting, I still got the bootloop, except it wasn't so simple as editing the task from safe mode. I used another computer to find that I had to delete the task manually, which was fun. Strangely enough, adding a delay of 30 seconds fixes the bootloop, probably because its not at startup. Still, why is it causing a total failure at boot if adding privileges isn't the problem?