When i try to make a server on a game (say a tf2 map for me and my friends only), my friends will try to join. When it is almost finished, it will fail on them and they don't join. Hiwever when they create the same map, i can join with ease, and it gets annoying. I know this is not the wifi, as i can connect with friends online on other devices. I wish to get this issue resolved soon, since i had it when i first got the laptop. I have tried resetting, temporarily disabling my firewall, antivirus program, and dell protection, but to no avail. If anyone can fix this issue, please tell me how.