To recreate the separate System REserved partition, which conveniently place the Repair Console normally on the DVD or REpair CD on the F8 Advanced Boot Options:
Mark the partition Active using Diskpart from the DVD System Recovery Options
Command Line: Partition - Mark as Active
or using free Partition Wizard
Now boot back into the DVD Repair console, accept any offered Repair. When Windows 7 won't start, boot back in again to run Startup Repair from the Options list up to 3 separate times with reboots until the SYstem Boot files are written to the boot partition and Windows 7 starts on its own.
If you have problems with this, take a camera snap of the drive map and listings using free Partition Wizard
bootable CD and post it back here. You can also use PW CD to mark Active and confirm you are attempting to write to a Primary partition.
Sometimes the System Reserved partition cannot be recreated in which case you can mark the Windows 7 partition itself Active to run the REpairs and start it. Make sure it is not a Logical partition using PW CD, which can Modify>Convert to Primary if need be.