I'm having the same issue. I reset Corporate iPhones for work and I'm getting this error message when I try to update and restore iPhones using iTunes:
The iPhone software update server could not be contacted. An unknown error occurred (0x80092010)
I have multiple Windows PCs, iPhone 6s, iPhone 7s, iPhone 11s, and a plethora of first party Apple USB to Lightning cables.
I've tried a number of combinations (iPhone 7s with one PC, then with another with a different cable, etc) but I'm getting the same error message for all. I also connected one of my laptops to my mobile hotspot to rule out any local network issues, and I'm getting the same issue.
Please advise when this is fixed.