I botched my boot record and windows 10 home said it couldn’t boot. I tried inserting the Windows Enterprise LTSB installation disk from work and running Repair your computer but it said it couldn’t fix the problem. Since Microsoft automagically updated my Windows 7 Home to Windows 10 Home there is no Windows 10 Home DVD to re-install Windows.
Here is what I did that worked. Start at the command line in the Advanced area after booting the Windows install disk and clicking Repair my computer.
Note Use the Bootrec.exe tool to troubleshoot a “Bootmgr Is Missing” error. If rebuilding the BCD store doesn’t resolve the startup issue, you can export and delete the BCD store and then run this option again. By doing this, you make sure that the BCD store is completely rebuilt.
To do this, type the following commands at the Windows RE command prompt:
- bcdedit /export C:\BCD_Backup
- cd boot
- attrib bcd -s -h -r
- ren c:\boot\bcd bcd.old
- bootrec /RebuildBcd
This information was found on https://support.microsoft.com/en-us/kb/927392