Go to your registry type in Bitlocker, disable the Bitlocker about four in a row going down. Reboot your computer and wha la, u have disabled bitlocker. Now when Windows boots up repair what files that are corrupt. Pretty easy when you are going to install new Windows, as a matter of fact if you installed Windows 10 use your original windows to complete the bitlocker registry disablement, pick install a driver, or image, which ever one pulls up Windows Security power shell, also you will be able to reformat your operating system drive. Rename the drive OS (?)...