You did not run a repair install. A repair install is run from the desktop and keeps all of your programs, files and settings in place but reinstalls the OS and refreshes the activation. I worked hard getting the commands so you could run this from your blue screen lockout.
You booted so it is a clean install. Now it won't start and I do not know why. Boot into the Win7 DVD repair console and run Startup repair repeatedly until it starts up. Tell me what it says if it finds an installation to repair.
You could have the activation blue screen (normally caused by reimaging) repair installed by now.
You may need to look at it with Partition Wizard CD to see where it put the intall and how its labeled, how other partitions are labeled.