Another possible solution: How to Turn Your Windows 8 or 10 Laptop into a Wireless Access Point
You can also try using the Windows 8.1 drivers and they should work. Hope that helps!
It shouldn't be too difficult to turn an old wifi router into an access point or a wireless switch?
A new TP-LINK wireless switch costs around 20 euro in my country, so personally I wouldn't even consider using hobby-bob methods.
But that's me