How to fix Windows 10 can not start error due to lack of system driver, code 0xc0000221

The error message "The operating system couldn't be loaded because a critical system driver is missing or contains errors" often appears when your computer cannot boot normally. One of the files that can cause this error is qevbda.sys. This file is located in %Windir%%System%drivers and it is related to the QLogic FastLinQ Ethernet product from Cavium. Inc / QLogic Corporation.

How to fix Windows 10 can not start error due to lack of system driver, code 0xc0000221 Picture 1

In this article, we will guide you on solutions to fix Windows 10 can not boot due to lack of system driver, code 0xc0000221 . You can try whatever solution you find appropriate to solve the problem.

1. Check the peripherals for any problem

This error can appear when peripherals such as external keyboard, USB . have problems.

You can diagnose by disconnecting device one by one to find faulty device. Also, you should update the compatible drivers for the devices to ensure they work in the most stable way.

2. Scan SFC

To fix this problem, you can also use the System File Checker (SFC) feature of Windows 10. When enabled, the SFC will perform a scan to see if there is a problem. If an error is detected, the SFC will automatically repair it.

How to fix Windows 10 can not start error due to lack of system driver, code 0xc0000221 Picture 2

3. Delete the faulty driver

To perform this method, you need to visit Advanced Options and select Command Prompt. In the Command Prompt window, enter the following command and press Enter

cd . cd windowssystem32 del netqevbda.inf

You can also use the above command to delete the qevbd.inf file. Note that before executing commands in Command Prompt, you should back up your Windows 10 system just in case.

4. Run Automatic Startup Repair

The next solution that you can use is to use the Windows 10 Automatic Startup Repair tool. This is the automatic error correction system that Microsoft integrates into Windows 10 and it can help you fix a lot of problems.

5. Restore the system with a backup file

If none of the above solutions helped you to solve the problem, you can try this last one. The condition of this solution is that you previously backed up your Windows 10 system. This solution also has a downside that you will lose files that you have not backed up.

Good luck.

Micah Soto

Update 20 January 2021

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