Windows 10 May 2019 Update

Fix APC_INDEX_MISMATCH BSOD in Windows 10/8.1 and 7

Windows Frequently Restart with blue Screen error APC_INDEX_MISMATCH Bug Check 0x00000001? Due To this APC_INDEX_MISMATCH BSOD windows unable to start normally to perform Troubleshooting steps? Mostly this Blue Screen occurs because of the incompatible system driver. Specially corrupted, outdated or incompatible Graphics driver. If you are also suffering from this BSOD Error, here apply bellow solutions to get rid of this APC INDEX MISMATCH BSOD Error.

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If you’d like to know more, you can search online later for this error: APC_INDEX_MISMATCH

Mostly Blue Screen Error Occur whenever your computer encountered with something it doesn’t know how to process. So it shuts itself down to prevent any damage, with Showing a Blue Screen with Error code APC_INDEX_MISMATCH. Incompatible, outdated Device driver, Corrupted system files or registry data base, memory Error, incompatible third-party application installation or virus, malware infection etc cause this blue Screen errors.


As there are various Reason behind this blue screen errors, We have to apply different solutions to get rid of this. First, remove all external Devices and restart windows check start normally. If yes then any external devices cause this issue, attach one by one and check after attach which drive blue screen started.

Also sometimes A simple restart resolve the BSOD error, After that apply bellow solutions to avoid feature APC_INDEX_MISMATCH BSOD error. But If due to this blue Screen Error windows frequently Restarts, didn’t allow login to perform Troubleshooting steps then we need to access advanced options to perform startup repair or boot into safe mode.

Access Advanced option

To access advanced option we need to boot from installation media if you don’t have then create one following link. When you are ready to change BISO setup, Boot form installation media. Then skip the first screen and on next screen click on Repair computer. Now click on Troubleshooting then Advanced options.

Fix Windows 10 Startup problems
Fix Windows 10 Startup problems

Preform Startup Repair

Here on Advanced options click on Startup Repair, This will restart windows and start diagnostic process.  Analyze the various settings, configuration options, and system files Especially look for :

  1. Missing/corrupt/incompatible drivers
  2. Missing/corrupt system files
  3. Missing/corrupt boot configuration settings
  4. Corrupt registry settings
  5. Corrupt disk metadata (master boot record, partition table, or boot sector)
  6. Problematic update installation

After completing the repair process, this will restart windows and start normally. Now follow below steps to avoid APC_INDEX_MISMATCH BSOD in feature. If the repair process results startup repair couldn’t repair your PC or automatic repair couldn’t repair Then we need to boot int safe mode.

startup repair couldn’t repair your PC
startup repair couldn’t repair your PC

Boot into safe mode with networking

If startup repair fails then boot into safe mode, where windows start with minimal system requirement and allow to perform troubleshooting steps. You can do this by click on Advanced options -> Troubleshoot -> Advanced options -> Startup Settings -> Click on Restart -> Then press F4 To access safe mode and F5 To access safe mode with networking.

Boot windows 10 into safe mode
Boot windows 10 into safe mode

Now windows allow you to log in to safe mode. Let’s perform troubleshooting steps such as update / Rollback / Rollback Driver, Scan and repair corrupted system files, Run DISM Tool to repair system image etc to fix and avoid  APC_INDEX_MISMATCH BSOD error.

Update / Re-install Device Driver

As discussed this BSOD error mostly occur due to corrupted, outdated driver issue. So first find out and Try to Update or Re-install problematic drivers especially the Display graphic Driver, Audio sound and Network adapter driver.

Update Driver

To do this press Win + R, type devmgmt.msc and hit the enter key. This will open Device manager and list all installed driver list. Here check any driver with a yellow triangle with exclamation mark, right click on it and select update. Follow the on-screen instruction to update the driver. Do the same especially for Display graphics driver, Audio sound, and network adapter driver.

Roll Back Driver option

Again if you notice the problem started after the recent driver update, Then you can use the Roll Back Driver option to revert back the current driver to the previous version. Perform Rollback Driver option remove the current driver and install the previous driver version.

To do this open Device manager by press Win + R, type devmgmt.msc and hit the enter key. Now expand and double click on the problematic driver ( for ex: display driver ) and move to Driver tab. Here you will see the Rollback driver option click on it, select the reason why you are roll back the driver and click yes to revert back the driver version. Restart windows and check windows start normally.

Roll back display driver option
Roll back display driver option

Re-Install Driver Software

If driver update fails and there is no Roll back driver option, That cause you need to perform Re-install the problematic driver by the following below. Visit Device manufacturer website and download the latest available driver (especially display driver, network adapter driver, and Audio sound driver ).

Then open Device manager by press win + R, Type devmgmt.msc and hit the enter key. Now expend the problematic driver ( for ex: Display driver ), Right click on it and select option uninstall the driver. When asking for confirmation click yes, follow the on-screen instruction to remove the driver and Restart windows.

On next Start windows automatically install the driver software which you removed before. If windows didn’t install then you can manually install them. To do this open Device manager click action and select Scan for hardware changes. This will scan and try to install the driver. Also if driver installation fails with yellow triangle mark then right click on it -> Update driver -> Browse my computer for driver software and set the driver path which you downloaded from the manufacturer website. Click next and follow on-screen instruction. After that Restart windows to take a fresh start and check Windows start normally without any BSOD errors.

search automatically for updated driver
search automatically for updated driver

 Run System File Checker

Also, most of the times corrupted system files cause Different Startup Errors include APC_INDEX_MISMATCH BSOD error. Run the System file checker Utility to repair corrupted, damaged system files and make Sure any corrupted missing system file not causing the issue.

To Run SFC utility open command prompt as administrator, Then type sfc /scannow and hit the enter key. This will start scanning for missing, damaged or corrupted system files if found any the utility will restore them from a compressed folder located on %WinDir%\System32\dllcache. Wait until 100% complete the process after that Restart windows and check there are no more startup BSOD errors.

Also if SFC utility Results windows resource protection found corrupt files but was unable to fix some of them, Then run the DISM Tool which Repairs the System image and enable sfc to do its job.

Check for Hard Drive Corruption

Again sometimes Disk Drive Errors, bad Sectors, Faulty HDD cause Different Startup Errors and windows failed to start with different BSOD errors. Run the Disk Check Utility CHKDSK to fix disk errors which may cause this APC_INDEX_MISMATCH blue Screen error.

To Check and fix disk Drive errors open command prompt as administrator, Then type command chkdsk c: /f /r  and hit the enter key.

Check And Fix Disk Drive Errors with CHKDSK
Check And Fix Disk Drive Errors with CHKDSK

Here command CHKDSK is the short of Check Disk, C: is the drive letter you want to check, /F means fix disk errors and /R stands for recover information from bad sectors.

When it prompt “Would you like to schedule this volume to be checked the next time the system restarts? press Y and Restart your computer. This will scan and repair The disk drive errors wait 100% complete after that windows start normally. You can Read with Details About CHKDSK command and how it works to fix Disk Drive errors.

Check Faulty RAM & Run Memory Diagnostic Tool

Also sometimes Faulty memory module ( RAM ) cause different Blue Screen errors. If all above methods failed to fix  APC_INDEX_MISMATCH BSOD error. Then check your RAM, Simply remove your computer’s RAM clean it and reinsert it perfectly after few second. You have to make sure that unplugged all the power cords. And also have to remove the battery before you attempting to remove the RAM. Restart your PC after doing that Also Run The memory Diagnostic Tool to Check and Fix Memory Related Errors.

Disable Fast Startup Feature

This step is applicable for Windows 10 users only! With Windows 10 Microsoft Add Fast Startup Feature ( Hybrid shutdown ) which reduce the Startup time and make windows 10 start very fast. But some users Report Disadvantage of Fast startup feature And Disable this Feature help them to fix most startup problems include Different Blue Screen errors.

You can also disable the Fast startup feature by following bellow steps and check APC_INDEX_MISMATCH BSOD resolved for you. To Disable Fast startup Feature open Control panel -> power options (Small icon view ) -> Choose What the power buttons do -> click on Change Settings that Are Currently Unavailable.  Then under Shutdown Settings Uncheck the option Turn on Fast Startup ( Recommended ) Click Save Changes.

Turn off Fast Startup on windows 10
Turn off Fast Startup on windows 10

Make Sure your System is Updated

Microsoft Regularly drops Updates with new features, Security improvements and bug fixes to patch the hole created by third-party applications. And may this bug fixes help to resolve the APC_INDEX_MISMATCH BSOD error, So make sure your windows computer is updated and have latest updates installed.

Windows is set to install Updates automatically but you can manually check and install latest updates by press Win + I to open settings -> Update & security -> windows update -> check for updates.

Checking for windows updates
Checking for windows updates

Some Other Solutions To apply

Make Sure your computer is not infected with any virus or malware infection, which may cause Different Startup errors include Blue Screen errors. We recommend install a good antivirus / antimalware application with latest updates and perform a full system scan.

Also Install free system optimizer like CCleaner to clean junk, cache, System error, memory dump files etc. And fix broken, missing registry Errors.

If You notice After installing a certain Third party application / Game or Cracked nulled software the APC_INDEX_MISMATCH BSOD error started. Then may the application is not compatible with the current windows version, which may cause the issue. That cause you need to uninstall the application. To do this press Win + R, type appwiz.cpl and hit the enter key. Then right-click on the problematic application and select uninstall.

These are some most applicable solutions to fix Blue Screen Error APC_INDEX_MISMATCH  Bug Check 0x00000001 on Windows 10 / 8.1 and 7 computers. I hope Apply above solutions your BSOD problem will be resolve and windows start normally. Still have any query, suggestion or face any difficulty while apply above solutions feel free to discuss on comments below. Also, Read Windows 10 Fall Creators Update Troubleshooting Guide 2017.

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