Hi Lil. I'm Greg, an installation specialist and 9 year Windows MVP here to help you.
Follow this tutorial for rebuilding the BCD, which works best by exporting it first. Remember the boot loader may not be on C but on another System partition. It will need to be assigned a drive letter to export the BCD, use:
DISKPART
LIST DISK
SEL DIS # (replace # with disk number shown in list for WIndows disk)
LIST VOL
SEL VOL # (replace # with volume number for System partition based on size)
ASSIGN (to assign a Drive letter)
LIST VOL (to see the drive letter to export BCD from)
Then continue with the BCD export and Rebuild.
If this doesn't work then what I would do is wipe the drive to reinstall WIndows following these illustrated steps in this link which compile the best possible Clean Install of Windows which will stay that way as long as you stick with the tools and methods given, has zero reported problems, and is better than any amount of money could buy: http://answers.microsoft.com/en-us/windows/wiki....
It is critical to delete all partitions or run DISKPART CLEAN to clean traces of GRUB.
If you have files that aren't backed up you can use the same bootable media to try to rescue your files using this method: http://answers.microsoft.com/en-us/windows/wiki...
You could also install a rescue install to another partition which if it starts up to a Dual Boot menu and will boot into your old install, you can then delete the rescue install in DIsk Mgmt as it has created a new bootloader for the old install - providing it put the boot files on the separate System Partition.
I hope this helps. Feel free to ask back any questions and let us know how it goes. If you'll wait to rate whether my post helped you, I will keep working with you until it's resolved.
________________________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.