Your router's starting settings are often set up for user convenience, and some of these decrease your overall security level.

The first thing I change before I change the Wi-Fi settings, and often before I plug the router into my internet jack, is the default login details.

Sure, you can make do with the router your internet provider has sent you and get internet without changing any settings at all -- if you like low security and slow speed.

1. Click the Start button and then go to Control Panel > Network and Internet > Network and Sharing Center (Windows 11) or ...