Ok, unless you have a disk with a vista image on it, you will not be able to recover from this type of error. If your pc is not prompting you to repair, you must insert a disk and prompt a repair. Or you must build a disk, and repair it from there.
That process is somewhat confusing, and can be quite complicated if you do not have access to another workstation to build the repair on.
Do you happen to have a vista disk?