Replace your router without reconnecting everything
Is it your internet provider's box? Call them first
If your router came from your internet provider, ask them for a current model. Providers usually swap an old gateway at no charge, and they'll often set it up for you. Ask them to keep your Wi-Fi name and password the same.
Write down your Wi-Fi name and password
They're usually on a sticker on the old router, or in its app under Wi-Fi settings. Copy them exactly: capital letters and symbols matter.
Set up the new router with the same name and password
Plug the new router into your modem (or your provider's box) and open its setup app. When it asks for a network name and password, type the old ones exactly. Choose "WPA2/WPA3" (sometimes called mixed or transition mode) so older devices can still connect.
Turn on the protections
In the new router's settings: turn on automatic firmware updates, change the admin password from the default, and turn off WPS, UPnP (unless a game console needs it) and remote management. While you're there, set its DNS to Cloudflare's family servers (see "Block malware sites for the whole house").
Retire the old one
Factory-reset the old router before it leaves the house, then recycle it or return it to your provider. Tap "I replaced it" on your HomeOS report.
Check your understanding
Why reuse the old Wi-Fi name and password?
Devices remember the name and password, so they join the new router on their own. No re-pairing.
Does reusing the name bring the old router's security problems along?
No. The problems were in the old router's hardware and software. The name and password are just settings.