X1-Thinkpad (Gen.1) finds no WLAN or network after update. Can someone help a layperson?

I have an X1 Thinkpad with Windows 10 Pro. Unfortunately the camera didn't work, so I looked for new drivers on the Internet. Today I found updates for the camera, BIOS and wireless directly on the Lenovo website - which I happily installed so that the camera finally works and the daughter is also visible during homeschooling during video lessons.

But after this update, the device no longer finds Wi-Fi / Internet / network. Nothing! You can't even open the Windows Office programs. Therefore, of course, can't update drivers or search for Obline problem solving. I'm really desperate because my daughter would need the laptop again for class on Monday and I "scrapped" it and made it unusable:-(.

Can someone help me here?

Perform a system restore.