My WiFi disappeared and I can't connect to internet

@daniilmatt29535 let us know which OS you are using. I assume it's a Windows machine. The next step is to check the BIOS. When your computer is starting press and hold or continuously press the F2 button to enter the BIOS Setup Utility screen. Once in that screen, go through the menus and see if your network adapter/card still shows.

It is possible that this is either a bad network card or a failed driver for the network card. You can get the drivers from here

This is what Huawei recommends as a fix:

Unable to connect to Wi-Fi Problem:

When trying to connect to a Wi-Fi network, the icon is missing in the lower right corner of the desktop.

Cause: A Windows update or third-party app may have installed an incompatible Wi-Fi driver or caused the Wi-Fi driver to be lost.

Solution: Go to C:\Windows\OriginalDriver\WiFiDriver and double-click the installer to re-install the Wi-Fi driver