system not meating requaierment even tho the same pc ran the game before

hello i am trying to return to POS2 but the game is saying that my pc dose not meat system requaierments and yes my CPU dose support AXV-512 by what google and other peaple ware telling my (my CPU is xeopn x3450).if u can hellp me i will be greatly apriciated and sorry for my bad english i am trying to get better at it.

Unfortunately your CPU doesn't support AVX/AVX2 or even AVX-512, as shown here: https://www.cpu-world.com/Compare/209/Intel_Core_i5_i5-7600K_vs_Intel_Xeon_X3450.html

Any CPUs from before a certain date didn't have them as the instruction set was yet to be implemented. Earliest I found is 2011. Your particular Xeon was from 2009.