Well there may have been, but now you may well be stuck with a reinstall.
If you can boot into safe mode there is still a chance by typing "sfc /now" in a command prompt window (start comp in safe mode with command prompt if you can).
If that doesn't work, you can try doing a repair installation, which won't erase all your files, it will simply overwrite the c:\windows folder.
If you can boot into safe mode there is still a chance by typing "sfc /now" in a command prompt window (start comp in safe mode with command prompt if you can).
If that doesn't work, you can try doing a repair installation, which won't erase all your files, it will simply overwrite the c:\windows folder.