/fixmbr : Writes a Windows 7-compatible Master Boot Record to the system partition.
BOOTMGR is missing & I no longer have the installation disk.
Struggling with a missing BOOTMGR in Windows 7? Don't download untrusted executable files. Learn how to safely repair or replace your boot manager using official Windows 7 installation media and command prompt tools. windows 7 bootmgr download
Restart your PC and press the boot menu key (usually F12, F11, or Esc) to boot from your USB or DVD.
Method 2: Manually Rebuild the Boot Sector via Command Prompt /fixmbr : Writes a Windows 7-compatible Master Boot
An outdated motherboard firmware version can sometimes fail to recognize the primary boot drive. Step-by-Step Solutions to Fix BOOTMGR Is Missing
If the system asks if you want to add the installation to the boot list, type (Yes) and press Enter . Close the Command Prompt and restart your computer. Method 4: Check and Change the Active Partition Don't download untrusted executable files
Windows Boot Configuration Data file is missing required information
Sudden power loss, hard drive bad sectors, or hard resets can corrupt the file.