I have installed W8 on my main PCs that have supported CPUs. I would now like to configure an older PC that does not have the option in bios set up. Details of system are shown in the attached screen shots.
SSE2, NX, and PAE are built into the processor. The BIOS has nothing to do with it. That class of P4 does not have support for NX so, unless you can work around it, W8 will not even install on it. The highest you can go is W7.