You can look for the processes that are CPU, memory and/or network-hogging, which is most likely to conflict with Warzone.
Below is how to close the games and apps running in the background: On Xbox: Also background programs could interfere with Warzone, causing the Memory Error 0-1766. If a few games and apps running in the background, your Xbox or PC won’t be able to let Warzone use all the resources and run smoother. Fix 2: Close running games and apps (Xbox & PC) If your Internet connection is solid but you still get the Memory Error 0-1766 on Warzone, try the next fix.