Overwatch 2 Error Code BC-100: How to Fix It

Easy 10-30 minutes Medium Severity Verified June 2026
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Error Code
BC-100
Brand
Overwatch 2
Product Type
game
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
10-30 minutes
Overwatch 2 error code BC-100 means the game has lost its connection to Blizzard's servers, usually due to a network interruption on your end or temporary server instability. This error can appear during login, matchmaking, or mid-game, and it will disconnect you from whatever session you were in. The good news is that BC-100 is almost always fixable at home without any technical expertise.
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Tools You'll Need

How to Fix Error Code BC-100

  1. Check Blizzard Server Status

  2. Restart Overwatch 2 and Battle.net Launcher

  3. Restart Your Router and Modem

    Do not just press the reset button on the back of your router — that restores factory settings and will erase your Wi-Fi name and password. Simply unplug the power cable instead.

  4. Switch from Wi-Fi to a Wired Ethernet Connection

  5. Flush DNS Cache and Renew IP Address (PC Only)

  6. Change Your DNS Servers to Google or Cloudflare

  7. Disable VPN or Proxy Services

  8. Check Firewall and Antivirus Settings

  9. Update Network Adapter Drivers (PC Only)

  10. Scan and Repair Overwatch 2 Game Files

  11. Contact Your ISP About Port Blocking

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When to Call a Professional

If you have tried every step in this guide and BC-100 persists only on your network, contact your Internet Service Provider (ISP). A technician can check for line issues, packet loss, or port blocking that you cannot fix yourself. If the error happens on all networks including mobile hotspot, contact Blizzard Support directly at https://us.battle.net/support — your account may have a flag or region routing issue that requires their intervention.

Frequently Asked Questions

What does Overwatch 2 error code BC-100 mean?
BC-100 means Overwatch 2 was unable to establish or maintain a connection to Blizzard's game servers. It indicates a network interruption, which could be caused by your internet connection, your router, a firewall, or a temporary outage on Blizzard's side.
Is BC-100 a server-side error or is it my fault?
It can be either. If many players are reporting BC-100 at the same time, it is likely a Blizzard server outage. If only you are experiencing it, the issue is most likely with your local network, ISP, or device settings.
Why does BC-100 keep happening during matches?
If BC-100 keeps disconnecting you mid-game, your internet connection is likely unstable with brief dropout spikes. Switching from Wi-Fi to a wired Ethernet connection is the most effective fix. You should also check with your ISP for line quality issues or packet loss.
Does a VPN fix or cause the BC-100 error?
Usually causes it. VPNs add latency and can route your traffic through servers that Blizzard's anti-cheat flags or that are simply too far from Blizzard's data centers. Disable your VPN before playing Overwatch 2. In rare cases where your ISP throttles gaming traffic, a gaming-specific VPN may help, but this is the exception.
Can BC-100 result in a competitive suspension in Overwatch 2?
Yes, unfortunately it can. Overwatch 2 treats any disconnect from a competitive match as a leave, regardless of the cause. If you are experiencing frequent BC-100 errors, avoid playing competitive mode until the issue is fully resolved to protect your account from suspensions and SR penalties.

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