When switching on the computer, if we encounter a bootmgr message. It means that we have deleted a vital file, of windows vista. The message is meant to warn us that the vital file is the reason for the software not working. It is meant to let the individual, solve this problem easily.
The Problem can be fixed by simply inserting the windows Vista disk, an following a set procedure.
The steps to follow are such:
Insert Windows Vista DVD media into DVD-ROM drive, and boot up your computer using CD-ROM drive. If your computer doesn’t boot up or at least prompt you to ask whether to boot up with CD-ROM drive, you need to change the boot up sequence setting in your BIOS;
At the “Install Windows” window, select your preferred language, time and currency format and keyboard or input method, and then click on “Next” button; On the next screen, click on the “Repair your computer” link on the bottom left corner;
Choose which Windows installation that you want to repair, in case you have many copies of Windows partition. In the case you have only one installation, the choice is obvious;
In the “System Recovery Options” window, click on “Startup Repair” to automatically fix problems that are preventing Windows from starting, including missing BOOTMGR and finally, the recovery process should be pretty fast completed.
Then take out your DVD, and try to boot up your computer using hard disk to check if the BOOTMGR is missing problem is solved. This solves the problem and receives the vital files back again, but if this does not work system restore remains the last option for the user.