A Guide to the APC_INDEX_MISMATCH Blue Screen of Death Error


STOP Code: 0x00000001

You’ve got a Blue Screen of Death, and you’ve noted that the error is called APC_INDEX_MISMATCH. You’ve come to the right place.

This bug has to do with a mismatch in the “APC State Index”. It’s complicated, but it’s usually the result of a poorly-written driver that’s executing an asychronous procedure call (APC) incorrectly or too many times. It’s not necessary to understand what that means (and it would take several pages to explain), but you do need to know how to fix this Blue Screen if it comes up.

A Guide to the APC_INDEX_MISMATCH Blue Screen of Death Error
An example of this Blue Screen in Windows 7.

Windows 7 Hotfix

If you’ve got Windows 7, Microsoft has a hotfix available that fixes the problem immediately. A hotfix is a program that automatically corrects bugs in Windows. Users of other versions of Windows: continue reading.

New Hardware

If you’ve installed hardware recently, and used a driver that came on the enclosed disc or auto-installed when you plugged it in, this driver may be the culprit. Read on to find out how to get that driver updated.

Driver Issue

Sometimes the Blue Screen will identify the driver causing the problem. If not, you’ll have to try to update all the drivers you can to their latest versions, especially for the aforementioned new hardware. To do so:

  1. Click Start (Windows Key + X in Windows 8)
  2. Click Control Panel
  3. Click Device Manager
  4. Right-click on each device and click Update Driver

This process can be tedious and time consuming. Luckly, we’ve got Driver Reviver, which can scan your PC for outdated drivers, then update them all at once, with just a few clicks. Frequent use of Driver Reviver is great for reducing Blue Screens of Death like this one.

Kernel Issue

This BSoD can also happen due to bad system files. Go ahead and run an sfc /scannow from the Command Prompt. Here’s more information on how to run sfc /scannow.

Good luck!

  • ReviverSoft


    Tente arrancar em modo de segurança para que você é capaz de acessar o seu PC e execute o Hotfix. Mais informações sobre o modo de segurança aqui:


  • Sounds like you downloaded the incorrect driver. How did you get this driver?

  • Teddi Terri

    Said that with mine as well..how can we be sure this program itself is not a virus?

  • Nvictory

    it is not a virus , do not worry , but take care , save your data in external drive cause it may lost

  • Never had the problem with Win 7 but I do have it now with Win 10 !!!

Didn't find your answer?
Ask a question to our community of experts from around the world and receive an answer in no time at all.

our products
See all products →

We develop products that help Repair, Optimize and Maintain your computer for you

Driver Reviver
Restore maximum performance and functionality to your PC's hardware.
Registry Reviver
Restore maximum efficiency and effectiveness to your PC's Windows Registry.
Security Reviver
Quickly and safely remove security threats, prevent them from reoccurring and keep your PC protected.
subscribe to our newsletter

Receive free tips and advices how
to repair, maintain and optimize your PC

Edit translation
Machine translation (Google):
Copy to editor
or Cancel