ok here's my problem, I tried dual booting Windows and OSX, but windows said bootmgr is missing, i heard online im supposed to use the disk and click repair instead of install, but it said it couldn't be repaired on the disk

Windows 7 DVD- Repair system- command prompt - cd.. - cd.. - up to the drive letter - write: copy bootmgr c:\ - restart- surely now will leave another error
with winload.exe automatically repair and give you repair it