Windows
7 curated resources, easiest first.
A hub for everyday network tasks in Windows 10 and 11, such as finding your IP address, setting a data limit, toggling airplane mode, choosing a public or private profile and setting DHCP or manual IPs.
Nearby sharing sends files and links to close-by devices over Bluetooth or Wi-Fi. This page lists common problems and what to try.
Troubleshooting steps for Wi-Fi problems on Windows 10 and 11, starting with the automated network troubleshooter and moving to manual fixes and network resets.
Explains how to share files and folders on a local network, map a network drive, stop sharing and troubleshoot connection problems.
Troubleshooting for wired connections that will not get online, covering cable and router checks, PC network settings and adapter driver fixes, with network reset as a last resort.
How to share a printer attached to one Windows PC so other Windows PCs on the network can add and use it.
A modified Hosts file can break name lookups and cause connection trouble. The page shows how to restore the default one on Windows 10 and 11.