By Dervish / Last Updated March 7, 2022


“Help! I have a computer that has been used for two years. Today it froze twice and when I went to restart it, a black screen came up with the following message:

Windows Error Recovery

Windows failed to start. A recent hardware or software change might be the cause.

If Windows files have been damaged or configured incorrectly, Startup Repair can help diagnose and fix the problem. If power was interrupted during the startup, choose Start Windows Normally.

-Launch Startup Repair (recommended)

-Start Windows Normally

Then, I tried the "Launch Startup Repair" option and it brought me to a screen that read:

Windows Boot Manager

Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:

1. Insert your windows installation disc and restart your computer.

2. Choose your language settings, and then click "Next."

3. Click "Repair your computer."

If you do not have this disc, contact your system administrator or computer manufacturer for assistance.

Status: 0xc000000e

Info: The boot selection failed because a required device is inaccessible.

I had no Windows Installation Disc, and my question is how to fix windows error recovery without cd? Anyone can help me? Thanks in advance!”

About the “Windows failed to start” error

If you encounter the problem that Windows failed to start, don’t be worry! Let’s learn some knowledge about the “Windows failed to start” error. Actually, there are many factors that can cause Windows to fail to start. One of the most common causes is the BCD is missing or corrupted. And that could happen because of disk write errors, power outages, boot sector viruses and so on. Besides, the file system itself may become corrupted or damaged. If you turn off the computer while writing critical data to the boot sector, this situation will happen more frequently.

How to fix Windows failed to start without disc?

Search on the Internet, we can easily find many methods to solve the problem about Windows error recovery. If there has a Windows Installation Disk in hand, you can solve this problem easily by using this Disc to repair MBR. However, some users do not have a Windows Installation Disk. how to fix windows failed to start without disc?

Method 1. Startup Repair

The error message screen provides users with a couple of options that can be used to resolve the issue. Such as Launch Startup Repair (recommended) and Start Windows Normally. You can click Start Windows Normally. If it still not working, choose the first option “Launch Startup Repair” to fix the problem. Then, follow the hints to finish the repair. If any problem is found, the Startup Repair will fix them automatically.

Method 2. Repair MBR with the best MBR repair tool

Besides Launch Startup Repair, you can also get another easy method to do this repair operation. What you need to prepare are: A working computer, a USB flash drive, and the best MBR repair tool - AOMEI Partition Assistant.

Before you do:

1. Download AOMEI Partition Assistant on the working computer. Then, connect the USB flash drive to the computer and make sure it can be detected.

2. Use AOMEI Partition Assistant to create a bootable media.

3. Insert the bootable USB you created before to the computer that its Windows failed to boot and boot the computer from the bootable media. Then, it will get into AOMEI Partition Assistant automatically.

Step 1. Right click the system disk and select “Rebuild MBR” in the pop-up window.

Rebuild System Disk MBR

Step 2. After that, you can set the type of MBR for the current OS. And click “OK”.

Choose MBR Type

Step 3. Then, it will back to the main interface, click “Apply” on the toolbar to commit these operations.


After it finished, unplug the bootable media and restart your computer.


  • “Rebuild MBR” cannot solve the problem about the operating system cannot be booted which because of the bootable file or system file losing. It only can solve problems like corruption of the MBR code.

  • Improperly rebuild MBR may cause your computer unbootable. So, you’d better learn more relevant knowledge before you do this operation.


Till now, you can easily solve the problem about how to fix Windows failed to start without disc. Besides Rebuild MBR, AOMEI Partition Assistant also provides many powerful functions to users. Such as resize/format/delete partition, Migrate OS to SSD and so on. You can use it to format exFAT to FAT32 easily. If you deleted the partition by mistake one day, you can also upgrade to AOMEI Partition Assistant to recover lost partition.