If whs idea does not work go with this
If you create a recovery DVD, you may be able to boot to recovery options Create Recovery DVD The Windows 7 recovery disk is used to boot Seven when it won't boot - to run Startup Repair, System Restore, access a Command Line, Recover using a Vista Backup Image, etc. System Recovery Options If Windows will not start now, boot the Recovery CD to run Startup Repair which automates System Restore as well as numerous other tests including System File Checker which can repair system files which are not corrupted beyond repair. If Windows still will not start, try booting into Safe Mode to run sfc /scannow to repair System files.
Special Thanks Given to Seven Forums.
Below is a bulletin distributed by MS to explain the start up procedure when Windows will not boot. Startup Repair
Problems starting up a PC can be tricky to fix, since Windows hasnít had a chance to load its arsenal of troubleshooting tools. Some people simply give up and reinstall Windows.
Startup Repair is designed to prevent a time-consuming reinstallation by diagnosing and repairing problems that prevent Windows from booting. Introduced in Windows Vista, Startup Repair is even easier to use because Windows 7 now installs it on your hard drive for you.
Click this bar to view the full image.
The Startup Repair tool in Windows 7 can help fix problems that prevent Windows from booting up. Get help