No sound on Windows 10 iMac 2017?

Question

WiFi

Good afternoon! Main problem: No sound on Windows 10 iMac 2017.
Installed Windows 10 on iMac 2017 using BootCamp. After installation, wifi was not connected, and BootCamp apparently did not upload drivers to the system. Through the cable, it turned out to connect to the Internet, and even earned wifi, but there is still no sound.
In Windows itself, there is no BootCamp Assistant at all in My Computer.
On the Apple website, they offer to download the drivers manually through Mac OS, but when I start the assistant there, it prompts me to simply return the disk back, i.e. remove Windows.
The second option from site, this is to go to the OSXRESERVED folder, but there is no such folder or section there either.
Tell me, please, what can be done?
BootCamp version 6.1.0