How to Fix Fix Error 0x80070043 — Network Name Cannot Be Found on Windows
Getting Windows error 0x80070043? Network name cannot be found? Cannot access network share? Mapped drive shows error 0x80070043? SMB connection failing? Network path not found? Fix error code 0x80070043.
Symptoms
You might be experiencing this problem if you notice:
- •Cannot access network shares with error 0x80070043
- •Mapped drives show "network name cannot be found"
- •File Explorer fails to open network locations
- •SMB connections to NAS or file server failing
- •Copying files to network share produces 0x80070043
- •Network discovery working but share access denied
Common Causes
- ⚠SMB protocol version mismatch between client and server
- ⚠Network share name misspelled or share removed
- ⚠DNS resolution failing for the network server
- ⚠SMB 1.0 disabled but target requires it
- ⚠Windows Firewall blocking SMB traffic
- ⚠Network discovery or file sharing services stopped
Solutions
Solution 1: Verify Network Path and DNS
- 1Test network connectivity:
- 2CMD: ping servername
- 3If ping fails by name but works by IP, DNS issue:
- 4Try accessing share by IP: \\192.168.1.x\sharename
- 5Flush DNS cache:
- 6CMD as Admin: ipconfig /flushdns
- 7Verify share still exists:
- 8CMD: net view \\servername
- 9If share not listed, check share configuration on server
Solution 2: Fix SMB Protocol and Services
- 1Enable required SMB version:
- 2Win+R → optionalfeatures.exe
- 3Check "SMB 1.0/CIFS File Sharing Support" if target requires it
- 4For modern servers, ensure SMB 2/3 is enabled:
- 5PowerShell: Get-SmbServerConfiguration | Select EnableSMB2Protocol
- 6Enable file sharing services:
- 7Win+R → services.msc
- 8Start: "Function Discovery Provider Host"
- 9Start: "Function Discovery Resource Publication"
- 10Start: "Server" (LanmanServer)
- 11Start: "Workstation" (LanmanWorkstation)
Solution 3: Configure Firewall and Network Profile
- 1Allow SMB through firewall:
- 2Windows Security → Firewall → Allow an app through firewall
- 3Ensure "File and Printer Sharing" is checked for your network type
- 4Check network profile:
- 5Settings → Network & Internet → your connection → Properties
- 6Set to "Private network" (not Public)
- 7Reset network if needed:
- 8CMD as Admin:
- 9netsh winsock reset
- 10netsh int ip reset
- 11Restart PC
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