When Windows overwrites Grub, it typically occurs during the installation of a new version of Windows. Windows installation process does not recognize the presence of Grub bootloader and may overwrite it with the Windows bootloader. This can happen if the Windows installation is done on the same drive where Grub is installed. As a result, the Grub bootloader is replaced, and users may no longer be able to access their Linux operating system until they restore Grub. **

Linux Grub may not start due to various reasons such as corrupted or missing configuration files, incorrect partition settings, hardware issues, or a failed installation. Additionally, if the system's boot order is not set correctly in the BIOS, it may prevent Grub from starting. It is important to troubleshoot these potential issues to identify the root cause and resolve the issue to successfully start Linux Grub. **

GNU GRUB 2.04 is a popular boot loader for Linux and other operating systems. It stands for GNU Grand Unified Bootloader and is used to manage the boot process on a computer. GRUB allows users to choose which operating system to boot into when the computer starts up, and it also provides advanced features such as the ability to boot into different kernel versions or rescue modes. Version 2.04 is the latest stable release of GRUB, and it includes improvements and bug fixes over previous versions. **

Grub install may not work due to a variety of reasons, such as incorrect installation parameters, a corrupted or damaged bootloader, or compatibility issues with the system's hardware or software. Additionally, insufficient disk space or a faulty installation medium can also cause grub install to fail. It is important to carefully follow the installation instructions and ensure that the system meets the necessary requirements for grub to be installed successfully. Troubleshooting steps such as checking for errors in the installation process, verifying hardware compatibility, and ensuring sufficient disk space can help resolve issues with grub install. **

When Windows overwrites the Grub (Grand Unified Bootloader), it typically occurs during the installation of a new version of Windows or when Windows updates its bootloader. This can happen because Windows does not recognize the presence of the Grub and may overwrite it with its own bootloader. As a result, the Grub menu, which allows users to choose between different operating systems installed on the computer, may be replaced by the Windows bootloader, making it difficult to access other operating systems. To restore the Grub, users can use a live Linux CD or USB to reinstall the Grub and regain access to their other operating systems. **

It is possible that Manjaro Grub was not installed correctly if you are experiencing issues with booting into your Manjaro operating system. This could be due to a variety of reasons such as a corrupted installation, incorrect configuration, or conflicts with other operating systems on your computer. It is recommended to try reinstalling Manjaro Grub or seeking assistance from the Manjaro community or support resources to troubleshoot and resolve the issue. **

To remove the GRUB bootloader, you will need to boot into your operating system and open a terminal. Then, you can use the command "sudo apt-get remove grub" to uninstall the GRUB bootloader. After that, you can use the command "sudo update-grub" to update the bootloader configuration. Finally, you can use the command "sudo apt-get install grub" to reinstall the bootloader if necessary. Keep in mind that removing the GRUB bootloader can make your system unbootable, so be cautious and make sure you have a backup plan. **

It is unclear whether or not you allegedly did not install a grub. If there are doubts or accusations about the installation of a grub, it would be best to address them directly and provide evidence to support your claim. It is important to clarify the situation and ensure that any misunderstandings are resolved. **