I need help with windows 7 bootmgr

May 10, 2018
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i'm really desperate... my main windows isn't working and i have a install disc but the repair options dont work and its like it wont use the hard drive in the secondary windows i have usb installed and there is no volume for it in diskpart
i have a dell xps and i dont want to overwrite the main drive so i rather find a solution because idk if replacing the oem partition and recovery partition would break it.if you need more information please let me know.