windows 7 restore : error 414

hi,

i use dual os.. i.e. win 7 and ubuntu.. win 7 being factory installed

recently due to many forced shutdowns of win 7, everytime i try running windows the 'black screen of death' appears..

so i started running the recovery disk.. but unfortunately, there was a power cut and my battery ran out when i was using the 4th disk..

thereafter, when i boot my system, i get
BOOTMGR missing

and when i try the recovery disks, i get
error 414, shutdown n try again