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Home/Fix/Fix Windows Error 0x80070049 — Duplicate Network Name

How to Fix Fix Windows Error 0x80070049 — Duplicate Network Name on Windows

Getting Windows error code 0x80070049? Duplicate network name or network naming conflict? Fix error 0x80070049 with step-by-step solutions.

Symptoms

You might be experiencing this problem if you notice:

  • •Error 0x80070049 when joining a network or domain
  • •Cannot create network share due to naming conflict
  • •File sharing fails with duplicate name error
  • •Network discovery shows duplicate computer names
  • •Domain join fails with this error code
  • •Mapped drives disconnect with error 0x80070049

Common Causes

  • ⚠Two devices on the network using the same computer name
  • ⚠Stale DNS records causing name resolution conflicts
  • ⚠NetBIOS name cache containing outdated entries
  • ⚠WINS server returning incorrect name mappings
  • ⚠Active Directory replication issues with computer accounts
  • ⚠Network adapter configuration creating naming conflicts

Solutions

Solution 1: Rename Computer to Resolve Conflict

  1. 1Open Settings → System → About
  2. 2Click "Rename this PC"
  3. 3Enter a unique computer name
  4. 4Restart the PC when prompted
  5. 5If on a domain, verify the new name in Active Directory
  6. 6Test network connectivity after rename

Solution 2: Flush DNS and NetBIOS Cache

  1. 1Open Command Prompt as Administrator
  2. 2Flush DNS cache:
  3. 3ipconfig /flushdns
  4. 4Flush NetBIOS cache:
  5. 5nbtstat -R
  6. 6Release and renew IP address:
  7. 7ipconfig /release
  8. 8ipconfig /renew
  9. 9Register DNS:
  10. 10ipconfig /registerdns
  11. 11Restart PC and test

Solution 3: Reset Network Components

  1. 1Open Command Prompt as Administrator
  2. 2Reset Winsock catalog:
  3. 3netsh winsock reset
  4. 4Reset TCP/IP stack:
  5. 5netsh int ip reset
  6. 6Reset firewall to defaults:
  7. 7netsh advfirewall reset
  8. 8Restart PC
  9. 9Re-test network operations
FIXES THIS IN 5 MINUTES

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