Not sure what all youve tried yet...but...regardless of windows 10 or windows 11, one of the best improvements you can make on an XPS, Laptop or Desktop, is ditch the wifi card and all of the Killer software and buy then swap in a $25-30 AX200 or AX210 card and install the Intel drivers. Killer's software and hardware is horrible in the XPS line. They may make something good, but for 95% of how XPS users use their systems, Killer is just a hindrance. On my OLED 7590 and 8950 this was the first mod i did and never looked back, nor never had the need to look back. Wifi is much more stable than it ever would have been.
Hi,  I have installed Windows 11 twice now, and both times my internet stops working. I have Killer Wireless-n/a/ac 1535 Wireless Network Adapter installed on XPS 8930. I have looked online for various fixes and nothing works. My system is fully updated, and still no joy.  I am thinking that the only way is to upgrade the network adapter, so does anyone have any recommendations for an upgrade on the Intel Killer 1535, for this pc? Thank you!
XPS 8930, WiFi stops working when Windows 11 installed