You've Windows 10 on your laptop. It had been there yesterday. However, whenever you switch on your computer, you're greeted with error code 0xc0000034, "The Boot Configuration Data file is missing."

The good news is that your data isn't lost, and you may get it all back (we'll demonstrate how). Unhealthy news is the fact that you'll have to do some try to restore that missing file. Here's how to fix a 'configuration data file' boot error in Windows 1o:

First, you'll need a DVD or USB stick containing Windows installation media. You can download a utility from Microsoft here that will create that for you. Next, follow these steps:

1. Insert your installation media into the computer.

2. Boot to the media. We'd to press F12 during bootup on the Dell we fixed up to achieve this menu, though these keys may differ depending on your laptop's brand name.

3. Click Next around the Windows Setup menu.

4. Click "Repair your computer."

5. Choose Troubleshoot.

6. Select "Advanced options."

7. Pick "Command Prompt."

8. Type Bootrec /fixmbr and press the enter key.

9. Type Bootrec /fixboot and press the enter key.

10. Type Bootrec /scanos and press the enter key.

11. Type Bootrec /rebuildbcd and press the enter key.

12. Type "A" to add the installation to the boot list and hit enter.

13. Exit the command prompt using the X button on top of the window.

14. Click "Continue" to go to your desktop.