Simplesmente reinstale o Windows 7 e recupere o GRUB. A técnica para recuperar o bootloader do GRUB é Felizmente coberta por Manual do Fedora :
In many cases, the GRUB boot loader can mistakenly be deleted, corrupted, or replaced by other operating systems.
The following steps detail the process on how GRUB is reinstalled on the master boot record:
- Boot the system from an installation boot medium.
- Type
linux rescueat the installation boot prompt to enter the rescue environment.- Type
chroot /mnt/sysimageto mount the root partition.- Type
/sbin/grub-install *bootpart*to reinstall the GRUB boot loader, where*bootpart*is the boot partition (typically,/dev/sda).- Review the
/boot/grub/grub.conffile, as additional entries may be needed for GRUB to control additional operating systems.- Reboot the system.