Bootmgr is Missing Fix
You may get this error while booting your computer.
NOTE: Sometimes it may take running a startup repair a few times before it fully fixes the startup issue.
1. Boot to the System Recovery Options screen.
2. Select the Startup Repair option. (See screenshot below)
3. Now click on Startup Repair. Run the startup repair and it will attempt to fix this issue.
NOTE: It will ask you to reboot your system. Reboot to see if it works. If it doesn’t work, follow step 4.
4. Click on Command Prompt.
A) Type c: and press <Enter>.NoteC:\ is the drive letter where Windows 7 is installed. You may replace it with whatever drive letter you want where you have installed Windows 7.
B) At the C:\ prompt, type cd boot and press <Enter>.
C) At the C:\Boot prompt, type the following commands and press Enter after each command.Code:bootrec /RebuildBcd bootrec /FixMbr bootrec /FixBoot
D) Now close the command prompt, remove the DVD and reboot your computer.
You will get back your Windows in Working condition.