Bootmgr is Missing

hello I have a problem with my computer sony as I run I get bootmgr is missing. you bought windows recovery essentaills and followed the instructions but when I set out my automated repair two options (data volume ntfs 100 mib no) and (data volume ntfs 288 gib no) mark the first or second option asking automated repair and I get the following message "the selected partition does not contain a valid Windows installation. you've either selected a data drive, or the volume has been formatted and cannot be rapaired.plese select a differnt drive to continue "if you ask him the other option" sistem restore "the message reads" the selected partition cannot be recovered with this repair cd. you must use Winre for unknown windows instead " I would be very grateful if you tell me what to do.