When enabled, BranchCache defaults to listening on port 80 which may interfere with other web services. Here’s how to shift it to a different port (8081 in this case)
# confirm that a system process is listening on 80
netstat -ano | findstr /c:":80 "
TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4
# change service mode so we can modify it
netsh br set service mode=local
# change the port
reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\PeerDist\DownloadManager\Peers\Connection" /v ListenPort /t REG_DWORD 8081 /f
# reset service mode
netsh br set service mode=distributed
# bounce the service
netsh stop peerdistsvc
netsh start peerdistsvc
# confirm that it's not on 80 anymore
netstat -ano | findstr /c:":80 "