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How to Fix Fix Error 0x80070039 — Network Name Limit Exceeded on Windows

Getting error 0x80070039 when accessing network shares? "The network name cannot be found" or name limit reached? Too many network connections? Fix this network resource limit error.

Symptoms

You might be experiencing this problem if you notice:

  • •Accessing network shares fails with error 0x80070039
  • •Can't connect to any more network drives
  • •File server access fails intermittently with this code
  • •net use shows error when adding new connections
  • •Network browsing stops working after many connections
  • •Mapped drives disconnect and won't reconnect

Common Causes

  • ⚠Maximum simultaneous SMB connections reached
  • ⚠Stale network connections consuming slots
  • ⚠SMB session limit on the target server
  • ⚠NetBIOS name resolution table full
  • ⚠Too many mapped drives and UNC connections active
  • ⚠SMB client configuration limiting connections

Solutions

Solution 1: Clear Stale Network Connections

  1. 1View all current connections:
  2. 2CMD as Admin:
  3. 3net use
  4. 4This shows all mapped drives and network connections
  5. 5Disconnect unused connections:
  6. 6net use Z: /delete (replace Z: with actual drive letter)
  7. 7To disconnect all:
  8. 8net use * /delete /y
  9. 9Then reconnect only the ones you need
  10. 10Also clear cached credentials:
  11. 11control keymgr.dll → remove old network credentials

Solution 2: Increase SMB Connection Limits

  1. 1Default limits are usually sufficient for home use
  2. 2For business environments with many shares:
  3. 3On the file server (if you have access):
  4. 4PowerShell as Admin:
  5. 5Get-SmbServerConfiguration | Select MaxChannelPerSession,MaxSessionPerConnection
  6. 6Increase: Set-SmbServerConfiguration -MaxSessionPerConnection 64
  7. 7On the client PC:
  8. 8Registry: HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters
  9. 9Add DWORD: MaxCmds = 50 (default is 15)
  10. 10Add DWORD: MaxThreads = 17 (default is varies)
  11. 11Restart PC after registry changes

Solution 3: Fix Network Resource Exhaustion

  1. 1If error occurs consistently:
  2. 2Restart the Workstation service:
  3. 3CMD as Admin:
  4. 4net stop workstation /y
  5. 5net start workstation
  6. 6This releases all network sessions and resources
  7. 7If server-side issue: restart Server service on file server
  8. 8net stop server /y && net start server
  9. 9Check for runaway processes holding many connections:
  10. 10Resource Monitor → Network tab → TCP Connections
  11. 11Look for processes with excessive connections to file servers
  12. 12Consider using DFS Namespaces to consolidate access paths
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