There are a lot of PC bugs and glitches in Cyberpunk 2077. Quite a few people have reported getting the “Expression: EXCEPTION ILLEGAL INSTRUCTION (0xC000001D)” problem while trying to play Cyberpunk. If you’re using an older CPU that doesn’t support AVX instructions, you’ll get this specific error message. If you’re having trouble getting Cyberpunk 2077 to run on your non-AVX CPU, this method can help.
The AVX Fix for Cyberpunk 2077
Keep in mind that this is not a permanent solution, but rather a workaround before we proceed. Unfortunately, this solution may not help everyone. Cyberpunk 2077 currently requires a CPU that supports the SVX instruction set to run, but maybe CD Projekt Red will release a patch in the future to fix this. The solution to this problem is detailed below.
Hexadecimal Fix
Launch a hexadecimal editor and load Cyberpunk2077.exe. After that, replace the first byte of “554881ECA00000000F2970E8” with C3. Simply replace it with “C34881ECA00000000F2970E8” if you have no idea what that means. You can now start Cyberpunk 2077 without experiencing Error 0xC000001D. If you’re at a loss as to how to change “554881ECA00000000F2970E8” into “C34881ECA00000000F2970E8”, searching it on YouTube will give some quick guides for it. This solution is not guaranteed to prevent future crashes in the game.
Cyberpunk 2077‘s performance on AMD Ryzen processors can also be improved with a similar workaround. This concludes our Cyberpunk 2077 article on how to run the game on a CPU that does not support the AVX instruction set and fix the Expression: EXCEPTION ILLEGAL INSTRUCTION (0xC000001D) bug. Please check out more guides on Cyberpunk 2077 by clicking on this link. You can also go to our homepage to read more articles on many games and tech. Thank you for reading this article.
