Let it finish. Those reckless forced shutdowns will only continue to make it worse. Then if it doesn't start boot back into Startup Repair by tapping the F8 key repeatedly at boot, run Startup Repair again. This time allow it to run System Restore. If this fails run System Restore from the System Recovery Options
These repairs might run better from Windows 7 DVD or System Repair CD.
If this fails, start at the top to work through the steps for Troubleshooting Windows 7 Failure to Start.
Everything possible to repair the OS is there, leading up to if necessary rescuiing your files to run Factory Recovery or get the superior Clean Reinstall.
Fill in your System Specs in bottom left corner of post.