If the launcher opens but the game never starts, check whether your system meets the minimum requirements and update your GPU drivers. Also verify the game files through the Bethesda.net launcher or Steam — corrupted install is one of the most common culprits here.
Error codes during login usually come down to a few things:
Fallout 76 is notoriously sensitive to network conditions. First, switch from Wi-Fi to a wired connection — this alone can drop your ping by 30–50 ms. If you're still seeing rubber-banding, go to your router settings and enable QoS, prioritizing gaming traffic. Changing the DNS to 8.8.8.8 sometimes helps too.
Sudden disconnects mid-game usually point to packet loss rather than full outage. Run a traceroute to Bethesda's servers and look for a hop with consistent loss. If the problem is on your ISP's side, contact their support with the traceroute log as evidence.
The UI freezing on the map or inventory screen is a known issue. Lower the in-game resolution and disable V-Sync — this reduces GPU load significantly. If the freeze happens on fast travel, lower texture quality one step down.
If an update crawls at 1–2 MB/s while your connection is fine, pause the download, close the launcher entirely, reopen it, and resume. Alternatively, set a download speed cap in launcher settings to 0 (unlimited) — sometimes the default cap is set too low after reinstallation.