Driver IRQL not less or equal L1C63x64.sys

Hello,

Welcome to Microsoft Community. I appreciate your efforts towards resolving the issue. I will certainly help you with the issue that you are facing.

This issue arises due to a driver failure, conflict or incompatible driver on the system.

Try the following methods and diagnose this issue further.

Method 1: Safe Mode

Step 1:

To start Windows 10 in safe mode:

1.    Search for Settings from the taskbar and select it from the search results.

2.    Select Update & security and click on Recovery.

3.    Go to Advanced startup and select Restart now.

4.    After your PC restarts to the Choose an option screen, select Troubleshoot >  Advanced options > Startup Settings >Restart.

5.    After your PC restarts, select a startup setting as Safe Mode with Networking by pressing the corresponding number.

If the issue does not persists in Safe Mode with Networking, then perform a Clean Boot to check if any third party application is causing the issue, as Clean Boot helps in eliminating software conflicts.

Step 2

Put the computer in Clean Boot and check if it helps.

By setting your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue.

How to perform a Clean Boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8
http://support.microsoft.com/kb/929135

Note: After Clean Boot troubleshooting step, refer to “How to reset the computer to start as usual after troubleshooting with Clean Boot” from the article.

Method 2: Run the System File Checker tool (SFC.exe)

System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. It will scan your system files and to repair missing or corrupted system files in Windows. To run the SFC scan, refer to the Microsoft article below.

http://support.microsoft.com/kb/929833

Method 3:

Update Drivers

Refer to the following article and update all the drivers available.

How to: Install and Update drivers in Windows 10

If you are unable to find the drivers for Windows 10, you may try to install the drivers in compatibility mode with Windows 8.1. 

Firstly download the driver from your computer's manufacturer website and then install it. 

Refer (Make older programs compatible with this version of Windows)

http://windows.microsoft.com/en-US/windows-8/older-programs-compatible-version-windows 

Note: This link also applies to Windows 10.

Hope this information is helpful.

Please do let us know if you need further assistance with Windows, we will be glad to assist you.

Hello,

Finally, the problem still persists even though I tried everything in this reply.

I am going to downgrade to Windows 7, unless there's something else you suggest me?

Thanks!

Charles.

I had the same problem and it turned out to be a conflict with Bullguard antivirus software. I have uninstalled this software and I had no more BSD for few hours. Hope it helps,

Hey,

I had issues with a third-party software (and drivers) from Juniper. I remember I uninstalled and removed everything related to those drivers on my computer and it helped a lot.

But in the end, I still downgraded to Windows 7 (for other unrelated issues).

But thanks for the answe!