Thanks, think I understand now. I'm not sure why you aren't getting network support during the Windows install. That seems a bit odd - it's never happened to me before. I'm wondering if the 790 uses slightly different wi-fi or LAN hardware that Windows doesn't recognise yet by default.
Hopefully, Murph_9000's links to those instructions will get things working, but if not, here are some additional ideas:
Assuming you haven't, grab the latest Windows ISO directly from Microsoft, then you might find that full 790 support has recently been added to the Windows image. Worth a try I think.
If you don't have the latest, grab it from here:https://www.microsoft.com/en-us/software-download/windows11
Assuming the above doesn't help, then once you are into Windows (see my second post below for Win 11), you can either use Armoury Crate to install the drivers or as you know, go to your ASUS motherboard support page and grab them from there. I know a lot of people don't like Armoury Crate, but it has been OK in my experience. I find it quite useful just to keep an eye on drivers if nothing else.
Another thing you might try is to use Intel's 'Driver and Support Assistant'. That runs a scan of your system and opens a browser window. From there, you can install any missing or outdated drivers directly. I've found it to be very good, but make sure you don't have ad blockers running when you use it. Sometimes it will identify newer drivers that aren't yet on the support pages.
Final thought - have a look at what BIOS and ME firmware version you are on. You can see the ME firmware version in the BIOS. The support pages should offer firmware and BIOS versions that 'match' each other. It's possible that an update on that front it also fix the initial network support issue. I don't know for sure, but again worth a look. If it does work, then once back into Windows, you'll need to install the ME Windows drivers as well. I just wrote a thread on Intel ME and BIOS updates if it helps.
Z690 Hero, BIOS 2305, ME Firmware 184.108.40.2066, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 22H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.