By Bryce / Last Updated August 16, 2019

Failed to boot Windows Server 2012

It is possible to meet Windows Server 2012 not booting issue. Windows Server boot failure can be caused by bad boot sector, corrupted Master Boot Record (MBR) and etc. If you have Windows Server installation disc or recovery disk, you can repair Windows Server from Command Prompt by fixing MBR, repairing boot sector and so on. But what should you do if you without installation disc or recovery disk?

A great bootable USB maker

If Windows Server 2012 is not booting but you are without installation disc or recovery disk, you can turn to a third-party bootable USB maker – AOMEI Partition Assistant Server to create Server 2012 bootable USB to boot the unbootable machine and rebuild MBR or check & fix errors to repair boot error.

It enables you to make bootable USB for other Windows Server operating systems including Windows Server 2019 / 2016 / 2012 R2/2008 (R2) and etc. as well. If you have CD or DVD at handy, you can also choose to create Windows Server bootable CD/DVD.

Create bootable USB for Windows Server 2012

Now, have a look at how to create Windows Server 2012 bootable USB drive via AOMEI Partition Assistant Server.

Step 1. Connect a USB drive to a Windows Server based machine, install and run AOMEI Partition Assistant Server on it. In the main interface, click on Make Bootable Media under Wizards menu.

Make Bootable Media

Step 2. In the pop-up window, choose USB Boot Device and click Proceed.

USB Boot Device

Step 3.You’ll be prompted that this operation will format the USB drive. Click Yes to continue.

PS.: If you don’t want to lose data on USB drive, you can back up it in advance.


Step 3. When the operation is completed, you’ll see All have finished successfully! Succeed in creating this USB bootable device. Click Finish.

Finish USB

Now, you have created Windows bootable USB drive successfully.

Perform Windows Server 2012 repair with bootable USB

After succeeding in making Windows Server 2012 bootable USB media using AOMEI Partition Assistant Server, you can insert the bootable USB device into the unbootable machine and enter BIOS to boot Windows Server 2012 from this USB. Once you log in, AOMEI Partition Assistant Server will start automatically. And then you can rebuild MBR or check and fix partition errors.

Fix corrupted MBR on system hard drive

When MBR is damaged, the operating system can be unbootable, with error message like Invalid partition table, BOOTMGR is missing or something else. You can fix MBR by following steps below:

Step 1. In the main console, right click the disk that you need to fix (here is system disk) and choose Rebuild MBR.

Rebuild MBR for Server

Step 2. In the pop-up screen, choose the type of MBR for Windows Server 2012. And then click OK.

For 7 8 10 2011 2012

Step 3. In the main interface, click Apply and Proceed to commit operation.

Check and fix errors for system drive

If rebuilding MBR is not valid, you can try to check and fix errors. Here are detailed steps:

Step 1. In the main user interface, right click the system partition (here is C drive) and go to Advanced >Check Partition.

Check Partition

Step 2. Among three options, choose Check partition and fix errors in this partition by using chkdsk.exe and click OK.

Check Partition and Fix Errors

Step 3. Wait patiently for the operation to finish.


AOMEI Partition Assistant Server enables to create Windows Sever 2016/2012/2008/2003 bootable USB or CD/DVD easily and quickly. This Windows Server bootable USB not only for reparing OS, but also for formatting system hard drive, copying partition , cloning disk and so on, when you failed to boot operating system.