Lenovo ThinkPad X1 Carbon Gen 13 will not connect to Wi-Fi or keeps disconnecting

The checks in more detail

If the Wi-Fi option has gone, check Device Manager for the wireless adapter and reinstall the driver from Lenovo's page. If it connects and drops, untick the adapter's power-saving option, forget and rejoin the network, restart the router and test on a phone hotspot. ThinkPads use a function key to toggle Wi-Fi in some configurations, and a Fn+F8 or airplane key can switch the radio off. On a company laptop, a VPN or security agent can interrupt the connection. Reset the network from Windows settings as a last step.

ThinkPads often join corporate networks with certificates, and an expired certificate or a changed password stops the connection without warning, so if Wi-Fi works at home and fails at the office, ask IT whether the certificate or profile needs renewing. Public hotspots may need a web login that the laptop cannot display until you open a browser. Check the driver date of the wireless adapter in Device Manager and compare with Lenovo's current release; a driver a year old on a new laptop lacks fixes for Wi-Fi 7.

Install the current one from Lenovo Vantage, restart and test again at the same place with the same router so the comparison is fair. Pay attention to roaming: in an office with many access points, a laptop that clings to a distant access point shows weak signal and drops, and Windows lets you set the adapter's roaming aggressiveness in its advanced properties; setting it to Medium-High makes the laptop switch sooner. Ask IT whether the office network uses a controller that needs a particular setting.