I received and asked to fix it because the wireless icon on the taskbar on the bottom right close to the clock wasn't showing, and the person couldn't connect to the internet.
I couldn't fix it so I formatted the laptop to factory setting. Beautifully the wireless appeared again, I was able to connect to the internet and download 76 updates. After a reboot I noticed that there were still 4 updates left, I clicked download and the wireless icon was gone again. I was shocked ! I restored the laptop to previous time but nothing. I formatted the laptop again as I did yesterday but this time the wireless didn't came back :( I went on device manager and everything is perfect no missing drivers or yellow exclamation marks. I went on the adapters tab and the wireless adapter doesn't show. Where did it go ? what am I missing ? what should I do to have it back. I don't know where to start to troubleshoot this issue, especially now that the laptop has just been formatted.
I am running windows 8
It's a Lenovo Yoga 2 11
Serial Number : YB03886923
Thank you for your help