BSOD "APC_INDEX_MISMATCH" upon opening game

My computer BSODs with the stopcode “APC_INDEX_MISMATCH” upon opening War Thunder.

RTX 3060, GeForce Game Ready Driver 537.42 (latest)
Ryzen 5800H, latest drivers
32GB of RAM
Windows 11

The most recent driver update I did was an NVME driver for my Crucial P3 1TB SSD, which could very well be the issue, but I don’t know how to roll back the drivers. It’s not as simple as opening up a dashboard and rolling them back since the drivers I installed were standalone, not part of some kind of dashboard. They’re simply an install wizard, no option to roll them back. It only happens with War Thunder, no other games.

Before this I also had an issue where randomly mid-game the game would freeze and completely lock up my laptop, requiring a hard reset to continue use. However I have since fixed that issue with a GPU driver update, so I’m pretty sure that’s unrelated.

Any help is greatly appreciated.

Did you google the error ?
There is some answer’s on certain realtek thing’s and overclocking trouble.

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Neither of these fixes apply to me. My Realtek drivers are the latest version and I don’t overclock my hardware.

did a system check ? sfc checker i mean with that


SFC Checker told me that there was something that needed attention - I opened the log file it made and it had “bthmodem.sys” listed as the problematic file. I had only ran /verifyonly as a precaution incase what it wanted to fix would screw something up but as this was the only file it wanted to fix I ran /scannow. This file seems to be related to another stopcode I had a while ago but had fixed, “IRQL_NOT_LESS_OR_EQUAL”. According to all resources it should be completely unrelated to this stopcode. Despite that it did fix my issue, thank you!

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next time google it and in 1 of the suggestions was the sfc checker :)