How to fix
Boot configuration error code 0xc0000034
on Windows

Ok, so I have a laptop for two months with Windows 10 preinstalled. Everything worked fine until today. I’ve restarted my laptop and get a BSOD with an error code 0xc0000034. I’ve tried reinstalling the system multiple times, but in vain because the error keeps reoccurring. Please help me as I’ve never dealt with such an issue before. Thanks!

Error code 0xc0000034 is a current Windows boot configuration error, also known as BSOD “The Boot Configuration Data file is missing.” Before the screen opens, people might notice prolonged boot preparation sessions, system slowdowns, software crashes, random Internet disconnection, and similar malfunctions. However, the 0xc0000034 error shows up unexpectedly and freezes the Windows screen without even booting the system up.

While the majority of people who have reported a 0xc0000034 error on Microsoft and other IT forums run Windows 10, the bug is not limited to this newest version of Windows. The culprit of the issue is Windows Boot Manager (Bootmgr) entry or rather its lack in the Boot Configuration Data (BCD) store. In some of the cases, 0xc0000034 BSOD may occur due to the Boot\BCD file damaged on the active partition.

Your PC/Device needs to be repaired.
The Boot Configuration Data for your PC is missing or contains error.
File: \EFI\Microsoft\Boot\BCD
Error code: 0xc0000034

Even though this BSOD is fatal, there is a solution that you can practice without professional technicians. However, there is only one method – to use bootable Windows Installation Media. If you have managed to log in to your account, we would recommend you to initiate a full system scan with a PC optimization tool, for example, [d1]. It will fix current system errors, which may prevent upcoming Windows Installation procedure. After that, follow the steps given down below:

How to fix boot configuration error code 0xc0000034 on Windows?

For 0xc0000034 error fixes, you have to prepare a DVD or USB with a bootable Windows Installation Media. Once you have an external drive prepared, go to the official Microsoft's website and download the latest version of the Windows OS, e.g. Windows 7, 8, 8.1, XP, Vista or 10. If you don't know how to create a Windows Installation Media, find relevant information here. Once done, follow these steps:

1. Boot the system using a Windows Installation Media.
2. Select language, time, currency, and keyboard/input method.
3. When the options are set, click Next.
4. Select Repair your computer (NOT Install Windows) and opt for Troubleshoot.
5. Click Advanced option and select Automatic Repair or Startup Repair.
6. When the system detects the OS, select the one that is running on your PC.
7. Finally, unplug the USB or remove DVD bootable media and boot up your device.

Hopefully, after re-installing Windows OS, you have managed to boot the system normally without encountering 0xc0000034 BSOD. If after all the problem reoccurs, please contact Microsoft-certified technicians and let them know about the bug.