Boot System Recovery Options from F8 tools menu, DVD Repair console, or System Repair Disc - Create
Accept any offered repair. If it fails to start, boot back in to run Startup Repair
System Restore should be automated by Startup Repair along with all other fixes, but if Startup Repair fails you can try System Restore from the options menu.
If this fails, confirm Windows 7 100mb SysReserved boot partition (or if you don't have it, the Windows 7 partition itself) is marked Active using Diskpart from Recovery Options Command line, or from free Partition Wizard
bootable CD: Partition - Mark as Active
Now run Startup Repair again x3. If this fails, change Active partition to Windows 7 partition to run Repairs again.
If this fails, run Dell Diagnostics by tapping the F12 Dell Boot menu key at startup.
You can copy out your files using this method: Copy & Paste - in Windows Recovery Console
Then run full Factory Recovery from boot or disks you made, restore from 7 DVD/Repair CD using a Windows 7 backup image you stored, or clean reinstall: Dell Restoring Your Computer´s Software to the Factory S ettings System Image Recovery Reinstalling Windows 7