Carrie has a Lenovo Yoga 2 convertible and it won't connect to the internet. It's asking for an adapter. Leo says that the Yoga is wireless, so it shouldn't need an adapter. Leo advises going into the Device Manager by pressing Windows Key and typing "device," then pressing Return. This will show her a list of all her hardware. That will show her if there's a problem with the networking device. She can delete it and then restart the machine. Windows will then reinstall the device driver. There's also a WiFi on/off switch. She may have hit the wrong function key which turned off her WiFi.
Carrie should check out this page at support.lenovo.com for more help.