so that I can upgrade it to Windows 11 the "legit" way instead of like this, what kind of motherboard+CPU can I get to replace my current ASUS Z170-A + i7 6700 while Windows 10 is still viable so ...
Microsoft's Windows 11 seems nearly ... unsure what your motherboard model is, you can try running "msinfo32" or "System Information" to find that. Third-party tools like CPU-Z, or Piriform's ...