New install, android keeps rebooting phone

[abdeviation]

So I just installed the newest version. I made sure I deleted the andboot folder and the "android" folder from my sd card before doing the installation. Now, when I run the startup utility, half the time the startup.txt file is empty (automagically). I then replace it with a fresh copy of startup.txt but then when it does boot, the unlock screen comes up and when I try to unlock, the phone just reboots. Any ideas?