After recovery no longer function of Wi-Fi, mouse buttons, brightness adjustment (Windows 8.1)?

I have just reset my laptop (Fijitsu Lifebook T935) with the recovery CD which was included and suddenly the mouse buttons, the Wi-Fi and the brightness adjustment no longer work. The drivers were not found / installed. I have already tried a second time without success and I have just no other computer at hand and the fact that the Wi-Fi is not working I can't update the drivers.

Does anyone know a solution?

I thank you in advance

Maybe the bios did not install the network driver. You can only browse through all the CDs and guess what's on the included CDs.

It remains clear: If you can't access the internet, how can you write this post?

Well from the phone aus😉