EXCEPTION_ILLEGAL_INSTRUCTION Error on Windows 11 – Need Help

Hi all,

I’m encountering a crash with the error:
EXCEPTION_ILLEGAL_INSTRUCTION

This happens when I try to launch [specific app or game, if known], or sometimes during general use. It either throws a BSOD or the application just crashes.

Any idea what could be causing this? Faulty CPU instructions? Incompatible software?

Thanks!

Tagged: Windows 11

System/ OS Errors

All Replies

Viewing 2 replies - 1 through 2 (of 2 total)

Xiomar

Participant

July 14, 2025 at 11:53 am

How do I check if my CPU supports AVX or other required features? Is there a simple tool for that?

Mira Lennox Lennox

Participant

July 7, 2025 at 11:26 am

If you’re getting an EXCEPTION_ILLEGAL_INSTRUCTION error or BSOD when launching an app or during use, it usually means the app is trying to use a CPU feature your processor doesn’t support. This can also happen due to a corrupted app install, overclocking, incorrect BIOS settings, or outdated drivers. In rare cases, faulty RAM or CPU may be the cause.

To fix it, try updating or reinstalling the app, check if your CPU supports the required features (like AVX), reset your BIOS to default settings and disable any overclocking, test your hardware, and make sure Windows and all drivers are up to date.

Viewing 2 replies - 1 through 2 (of 2 total)