We see this sometimes when GRUB is on the same HD with Windows 7, corrupting it beyond repair.
There are additional steps using bootrec command and Partition Wizard here so you will know you've done everything possible, and can copy out your files to reinstall or run Recovery:
Troubleshooting Windows 7 Failure to Boot
If you will post back a camera snap of the maximized Partition Wizard CD drive map and listings we can look it over closer for you.