You can download and burn a Repair CD from
here. Try to boot into WinRE and then go for a Startup Repair. It might take 2 or 3 times for the repair to complete if it can. Because of the situation, it might not be able to complete.
It is just really hard to tell where you system is right now, so post back any clues as to what happens and when you can. If you want, you could go to the Command Prompt using the Recovery CD and run a Chkdsk.
You could also use an install DVD or Repair CD from a friend if they had the same version of Windows 7.