Does the HD register in BIOS setup, accessed by tapping the key given on first boot screen at restart? Test your HD using maker's HD Diagnostic
extended booted CD scan.
How did you boot into System Recovery Options
to run Startup Repair?
Use the System Repair Disc - Create
or Windows 7 Installation DIsk REpair console.
If no installation shows after booting into Repair then open a Command Line from the Options list, type bootrec /fixboot
and bootrec /fixmbr
to see if it will show up for Repair.
THen run Startup Repair repeatedly.
Next make sure the Windows 7 partition or it's 100mb SYstem REserved partition are marked Active using Diskpart from Comannd Line: Partition - Mark as Active (Method Two).
If 100mb is marked Active and it will not start after running Startup Repair 3 times then switch the Active flag to Windows 7 partition itself to run Startup REpair 3 times with reboots.
You can see a picture of your HD to mark Active and try another method which sometimes works to start Windows 7: boot free Partition Wizard
bootable CD, check for Active partition and/or change using rightclick>Modify. Then click on HD to highlight it, from Disk tab select REbuild MBR, reboot. THis may preclude the need to run 3 Startup Repairs from Repair CD/DVD.
If these and the steps I gave earlier repair attempts all fail then you'll need to run Factory Recovery from its partition, from disks you made or can order from manufacturer's Tech Support. Or you can find a Windows 7 installation DVD for your version to clean reinstall with the Product Key on COA sticker following these steps to get a perfect reinstall: Reinstalling Windows 7
You can copy out your files using Repair CD or DVD with this method: Copy & Paste - in Windows Recovery Console
Please fill in your SYstem Specs in the bottom left corner of post - at least your computer make/model.