BOOTMGR is missing & I no longer have the installation disk.
The good news is that you don't need to download Bootmgr separately. Bootmgr is an integral part of Windows 7, and you can repair or restore it using built-in tools. Here are the methods: windows 7 bootmgr download
Once you have booted from a repair disc or USB, follow these steps to restore the missing file: BOOTMGR is missing & I no longer have the installation disk