[juliabest]

Of course, you will need a router you can also use a wifi router as an access point it is better to use your old sell it you can cover your entire house with two routers by using as an access point

 

[ExDilbert]

Technically, a router is not required but a modem is. Windows still supports protocols that are used by routers for account validation. (The PC could also act as a wifi access point using a wifi card or motherboard with wifi.) However, that's a really, really bad idea since it is significantly less secure than using a dedicated router with a built in firewall. Even better is to use a dedicated, standalone firewall since some routers are poorly supported or not supported at all which can make them insecure. Some makes of routers are updated faster and for a longer time than others. The open source software used for dedicated routers is usually updated quickly when security vulnerabilities are found.

 

[JamesK]

The open source software used for dedicated routers is usually updated quickly when security vulnerabilities are found.

I use pfsense for my firewall router. It's far more capable that SOHO routers. I have a separate Unifi access point.