While using Windows 10, there are many users who have experienced the blue screen or crashing of the screen. The same problem is experienced in different Windows 10 editions. However, majorly found in Windows 10 Professional and Windows 10 Enterprise.

There is a blue screen with the error “APC INDEX MISMATCH” or an error of “Igdkmd64.sys” that has failed. The problem is the same and here we will show you how to Fix APC INDEX MISMATCH Error on Windows 10.

Related Topic: Quickly Fix Windows Update Error 0x80080008 On Windows

Reasons why have you faced APC INDEX MISMATCH error?


The APC_INDEX_MISMATCH BSOD or Igdkmd64.sys has failed error is caused by the incompatibility of drivers or faulty hardware. While checking the error, bug error 0x00000001 has been issued.

It has been mainly experienced with Realtek or NVidia drivers. Which indicated that the error is totally caused by the graphics drivers.

Either APC_INDEX_MISMATCH due to desktop can’t access the graphics drivers or BSOD prompts right after logging into Windows. Here APC_INDEX_MISMATCH BSOD also indicated that a broken Igdkmd64.sys file is there in your system.

If you have connected your desktop with HDMI then there is also a chance that your HDMI driver is not working properly. This can also be related to the errors earlier.

All this means that you can fix the entire problem by just fixing the file. Even Microsoft has agreed with the error and has brought a Windows update to fix it. If you are using Windows 10 version 20H2 (or previous versions), then uninstalling update KB5000802 can fix the APC INDEX MISMATCH error easily.

News updates have almost fixed the issues but caused to bring APC_INDEX_MISMATCH win32kfull.sys error. this also indicated the error to the Igdkmd64.sys file.

Personally, we have seen thing ways to fix the error from the BIOS. Will state that it can’t be fixed from BIOS and need to be fixed from Settings. As the error is in the Windows file system.

How to Fix APC INDEX MISMATCH on Windows 10?

Here is how to fix the APC INDEX MISMATCH error.

Go to Control Panel.

Inside the Control Panel, go to Program > Uninstall. In Uninstall, click on view install update.

Now, select the KB5000802 and uninstall it.

Related topic: Download Windows 20H2 update

Related topic: How to Fix Windows Update Standalone Installer Error 0x80096002

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