ML keeps restarting after installation! HELP!

I have installed ML and after the installation, it keeps restarting itself. Sometimes it will make it to the desktop and other times will just restart when at grey screen. I have rebooted to disk utility using CMD+R and verified and repaired permission and it still did not help the problem. Now I have booted in safe mode, and it says my software is 10.8 (ML). The update does not show up in my app store, what is the next step to reinstalling ML or any other ideas