Here we can see, “How to Repair the Windows Vista Bootloader”
The EasyBCD documentation/user manual/wiki has a part that offers more than simply instructions on how to use the application. Here’s how to fix it if you’ve corrupted your bootloader, encountered one or more bootmgr-related issues, installed Windows XP or Linux after Vista, or otherwise managed to fry, crack, melt, or shatter the Vista bootloader.
We’ve combined knowledge from over two years of experience correcting faulty bootloaders into a single guide divided into subsections based on the severity of the bootloader’s damage. If you can get into Windows, we recommend downloading and installing EasyBCD, then repairing the Vista bootloader from within Windows using the steps in this section of the article.
Get your Windows Vista DVD out and boot from it if your bootloader is so damaged that you can’t get into a Windows operating system. If you don’t have a Windows Vista DVD, get a copy of our Windows Vista Recovery DVD, put it in your CD-ROM drive, and get ready to boot.
Simply follow these methods to restore the Windows Vista bootloader once you’ve booted from the Windows Vista DVD/Recovery CD: To solve your problem, try recovering the Windows Vista Bootloader from the DVD.
Whether you use EasyBCD to recover from within Windows or boot from a CD/DVD, you’ll have various options for what to do next. If all you did after installing Vista was install another OS (such as GRUB overwriting the Vista bootloader or the Windows XP NTLDR bootloader taking over the MBR and destroying the Vista bootloader), follow the necessary procedures to reinstall the bootloader to the MBR and/or bootsector.
However, if your BCD registry has changed and now contains missing entries or invalid references, you’ll need to take more drastic measures. You can use EasyBCD to clean up your BCD data and then add the entries you need, or you can use Windows Vista’s recovery center to look for any missing Windows Vista installs on your hard drive.
But there are instances when that isn’t enough. You’ll have to destroy the registry (nuke it) and start over if the BCD registry isn’t simply incomplete or inaccurate but also corrupted or damaged. This is simple with EasyBCD, thanks to the “Recreate BCD Registry” option; however, when booting from the Vista DVD, the method is slightly more difficult, requiring direct intervention with the bcdedit.exe, bootrec.exe, and bootsect.exe commands.
Regardless of your issue, whether it’s a misplaced MBR or a corrupted BCD registry, you should be able to fix the Windows Vista bootloader by following one of the two sets of instructions on this page.
1. How can I reinstall Windows after uninstalling the Linux and Grub bootloaders?
To utilize recovery tools to fix Windows, select the bullet option at the top and then click Next. Select Command Prompt from the list of recovery tools, then type bootrec /rebuildbcd into the command prompt.
2. What exactly is Bootrec?
Bootrec.exe is the ultimate repair utility for Windows boot problems. The Master Boot Record (MBR) can be repaired, a new boot sector can be written, the Boot Configuration Data (BCD) can be rebuilt, and missing Windows installations can be added to the boot configuration data with this tool.
3. What happens if the MBR becomes corrupted or damaged?
The MBR holds the disk’s Partition Table as well as a small bit of bootable code, making it an important aspect of your computer’s startup system. The MBR file can become corrupted when a computer is shut down incorrectly. As a result, if the MBR is corrupted, the operating system will not boot.
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