If you’ve searched for you are likely desperate to fix your computer. However, the internet is littered with dangerous third-party DLL sites offering infected files.
Instead of downloading a raw file from the internet, you should "download" the Windows 7 Installation Disc (ISO) from Microsoft (or use your original DVD). This provides a clean, virus-free, and version-matched source for the bootmgr file. windows 7 bootmgr download
If you are seeing a "BOOTMGR is missing" error, you generally do not need to download a standalone file. This error occurs when the Windows Boot Manager—a crucial hidden file located in your system's root directory—is corrupted, deleted, or the system is looking at the wrong drive If you’ve searched for you are likely desperate