I just spent the day setting up my new lap top with Windows 11 and ran into the problem described in these posts. I resolved the issue by removing all of the software installed by the Drivers and Utilities Combo Package Installer. I then rebooted the PC and just installed the Printer Driver v2.71.00. When the screen shows the option for "YES: Network Connection" or "USB Connection" choose "YES: Network Connection". Then selected search options "Connect to the printer with the specified IP address" and plugged in the IP Address being used by my ET-2750 printer. I found that address by printing out the network settings. That is done by using the printer control panel. Under Settings-?Network Settings->Print Status Sheet. On the printout there is a section headed: TCP/IP IPv4 and under that section there is a setting named IP Address that you enter in the aforementioned screen.
A little convoluted but as of this evening it seems to be working. Of course I don't know if/when the IP Address may be modified. Hopefully the address is just set once when initially configuring the printer to the WIFI network. I'm going to make some detailed notes for myself because I'm sure this will all be forgotten the next time this becomes a problem.
Hopefully someone will find this helpful. I've had a long frustrating day.