#ACTIVE BOOT DISK NOT BOOTING HOW TO#

Make the bootmgr partition active via Command PromptĬommand Prompt - a powerful Windows built-in feature for disk management – is what you can try first to recover missing bootmgr. If bootmgr is missing after making a wrong partition as active, you can refer to the following ways to bring it back.

So, if you don’t set the bootloader partition as active, you’ll have trouble booting up your PC. Generally, there’s only one active primary partition on a PC that contains bootmgr. One of the causes is that you mistakenly set a wrong partition active.

Sometimes, you may not be able to boot up your PC due to missing bootmgr.

#ACTIVE BOOT DISK NOT BOOTING HOW TO#

How to fix missing bootmgr after setting a wrong active partition? If bootmgr is missing, you can’t boot up your computer. The manager reads boot configuration data and displays OS selection menu. It replaces the NTLDR boot manager in previous versions of Windows. As I don’t have a Windows 10 installation disc, what to do next?' Overview of Bootmgrīootmgr is the Windows boot sequence manager first introduced in Windows Vista. 'I accidentally made the C drive an active partition and my computer won’t boot up as of now, saying that bootmgr is missing and asking me to press CTRL + ALT + DELETE to restart. Bootmgr is missing after setting a wrong active partition

Active boot disk not booting