APC Index Mismatch error in Windows 10 Fix

APC Index mismatch error message may appear on your computer while starting it up. It is not a regular Blue screen of Death issue as this error prohibits your access to your computer. To solve this issue, follow our guide minutely.


Fix 1 – Clean boot in Safe mode

Clean booting your computer in Safe Mode should fix this issue.

Before going ahead you have to access the Advanced Repair window manually.

Follow these steps to do so~

a. At first you need to switch off your device.

b. After switching it off, just press the power button to start it up again.

c. The moment you see that the manufacturer’s logo has appeared, just press-hold the power button.

d. After that, what you need to do is to continue this for 2-3 more times.

Then, the fourth time, your pc should automatically come to the startup repair screen.

Once the Automatic Repair opens up, proceed this way-


Step – 1 Boot up your computer in Safe Mode

You need to boot up your computer in safe mode.

1. Click on the “Advanced Repair“.


Auromatic Repair Advanced Option


2. After that, you need to click on “Troubleshoot” to check out the advanced startup options.


Advance Troubleshoot


4. Then click on the “Advanced options“.


Advanced Options


5. Then, click on the “Startup Settings“.




6. On the bottom-left corner of the corner you will notice “Restart“.

7. Click on it.


Startup Settings


7. Simply press the ‘F4‘ key to “Enable Safe mode “.

After pressing the F4 key, your system will start to boot into the safe mode.


Safe Mode


In safe mode, your computer will look like black, ‘safe mode’ written at four corners of your screen.


If your computer goes in Safe Mode, proceed to the next step.


Step 2 – Clean boot your device

In Safe mode, clean booting your device should identify and fix the issue.

1. Just right-click on the “Windows icon“. After that, click on the “Run“.

2. Here you need to write “msconfig” and click on “OK“.


Run Command Search Field Type Msconfig Enter


3. In the System Configuration window, go to the “General” section.

4. Check the “Selective startup” option.

5. Then you have to check the box beside the “Load system services.


New System Config


6. After that, go to the “Services” tab.

7. Do not forget to check the “Hide all Microsoft services” box.

8. Finally, to disable the third-party drivers on your computer, you have to click on “Disable all“.


Hide All Items


9. Next, step, go to the ‘Startup‘ tab.

10. Click on the “Open Task Manager“.


Open Task Manager


11. When the Task Manager opens up, right-click on each item one-by-one and click on “Disable” to disable them all.


Disable All


Once you have done disabling every startup item, close the Task Manager window.

12. Coming back to the System Configuration screen, click on “Apply” and “OK”.


Apply Ok


Reboot your computer and check if the error code is still showing or not.


Fix 2 – Update graphics driver

Updating the graphics driver has fixed this problem on many computers.

Boot your computer in Safe mode just following the steps explained before. Follow these instructions once you are in Safe mode

1. Press Windows key+X. Then, click on the “Device Manager“.


Win + X Device Manager


2. Once the Device Manager appears, expand the section named “Display adapters“.

You will notice the graphics driver you are using.

3. Right-click on your graphics driver and then click on “Update driver“.


Udpate Display Driver New


4. After that, click on “Search automatically for drivers“.


Seach Automatic Graphics Driver


You will have to wait for a while as Windows will install the latest update.

5. Then, click on “Network adapters“.

6. After that, right-click on the network driver you are using and then click on “Update driver“.


Network Adapters Update Driver


7. Again you have to click on the “Search automatically for drivers“.


Search Automatically For Updated Driver Software


This will update the network driver on your computer.

Reboot your computer and check if this fix is working or not.


Fix 3 – Change DNS

Diagnosing the network adapter should identify the problem and fix it. After booting up in safe mode, follow these steps.

1. Just right-click on the network icon on the taskbar.

2. Then, click on the “Open Network & Internet Settings“.


Taskbar Network Icon Right Click Open Network & Internet Settings


3. Then, click on “Change adapter options


Change Adapter Options


4. Right-click on the adapter you are using and then click on “Diagnose“.


Diagnose Network Adapter


Now, follow the on-screen instructions.

If Windows can’t detect any problem with your network, close the troubleshooter and follow these steps-

5. Again right-click on the adapter and this time, click on the “Properties“.


Network Connections Active Wifi Connection Right Click Properties


6. To modify the IPv4 settings, you have to double click on “Internet Protocol Version 4 (TCP/IPv4)“.


Double Click Ipv4


7. When you see that the Internet Protocol Version 4 (TCP/IPv4) Properties window has opened up, click on  “Use the following DNS server addresses:

8. After that input these following DNS servers settings-

Preferred DNS server:
Alternate DNS server:

9. Click on “OK“.


Use The Following Address Dns 8 8 8 8


Once you have done so, close the window.

The problem should be solved.


Fix 4 – Reset the network adapter

Resetting the network adapter on your computer should fix the issue.

[Warning– Resetting the network adapter will remove every network adapter from your computer and reinstall them again. In the process, all the network settings (login ID, password, network addresses) will be erased. VPN softwares will be removed along the way. ]

1.  At first open the Settings by pressing the Windows key+I.

2. After opening the Settings, you have to click on the “Network & Internet“.


Settings Network & Internet


3. On the left-hand side, click on “Status“.

4. After that, on the right-hand side scroll down to click on “Network reset“.


Network Reset


5. Then, click on “Reset Now” to reset the adapter.


Reset Now


After resetting the network, restart your computer.

After restarting your PC, connect to the internet once again. This should fix your issue.