How to replug adapter.my laptop is saying network adapter is unplugged.i never had a cable?

I have Lenovo g580. I was using my Wi-Fi earlier also. But when I updated it from windows7 to windows 10 I'm having this problem. When I visited device manager and clicked on network adapter. I got to know that my realtek wlan apater is not working properly. And showing (code10).before updating I used my Wi-Fi and I dint have any cable. What to do. I want to enjoy the features of windows 10. An answer would we greatful.

You should try the Lenovo and Realtek websites and see if there are any Windows 10 drivers for the particular wireless adapter.

Otherwise, learn by your mistake and roll back to Windows 7, which is arguably a far better version of Windows than Windows 10 is at the moment. You should have 30 days from the date of changing to Windows 10 to go back.

Hopefully Microsoft and the other companies will get their joint act together in the next few months.