Lenovo Flex 2-15: Can't connect to wireless Internet after installing Windows 10. How to fix this?

So we just bought the Lenovo Flex 2 15 laptop about a month ago. It came with Windows 8.1. When we first used, we tried connecting to the wireless internet in my house (The router has no problems). No Wi-Fi connections were showing up at all. To solve the problem, we downloaded the driver and the Wi-Fi worked successfully.

So we installed Windows 10 yesterday and now I see a list of wireless connections. But when I click any of them to connect to, Windows would say, "Can't connect to this connection". I repeatedly tried this and even restarted my computer many times. I even did research on the Internet about this stuff. I also tried diagnosing the network problem on windows and I read some codes. The issue was that my computer was not authenticating with any of the connections. The only thing I did not do was call a tech support from Lenovo.

Does anyone have this problem?

You need to the download the driver again.