If you’ve encountered Windows System Error Code ERROR_86, don’t worry—you’re not alone. This error often appears when there’s an issue with network authentication or accessing shared resources, commonly related to a problem with network credentials or domain permissions. In this step-by-step guide, we’ll walk you through how to troubleshoot and fix the ERROR_86 on your Windows computer.
What is Windows System Error Code ERROR_86?
Before diving into the fix, it’s helpful to understand what ERROR_86 means in Windows. The message typically reads:
"ERROR_86: The specified network password is not correct."
This error occurs when Windows fails to authenticate your credentials while trying to connect to a network resource, such as a shared folder, printer, or server. It usually points to incorrect username or password information being used, or potential issues with stored credentials or account permissions.
Why Does ERROR_86 Occur?
Common causes include:
- Incorrect or outdated network password.
- Cached credentials conflicts.
- Domain or workgroup authentication issues.
- Changes in password or user permissions on the server.
- Network sharing or security settings misconfiguration.
- Corrupt or outdated Windows network components.
How to Fix Windows System Error Code ERROR_86: Detailed Step-by-Step Guide
Step 1: Verify Your Network Credentials
The first and simplest step is to double-check the username and password you’re using for the network connection.
- Make sure you are inputting the correct username and password.
- If you’re part of a domain, verify if the username needs a prefix like
DOMAIN\Username.
Remember, passwords are case-sensitive, so confirm caps lock isn’t accidentally enabled.
Step 2: Clear Cached Credentials
Windows often stores network credentials in the Credential Manager. Old or incorrect cached credentials can lead to ERROR_86.
- Open the Control Panel.
- Search for and open Credential Manager.
- Click on Windows Credentials.
- Find any stored credentials related to the network resource.
- Select them and click Remove.
- Restart your computer.
- Try reconnecting to the network resource and enter fresh credentials when prompted.
Step 3: Use Command Prompt to Reset Network Connections
Sometimes, lingering network sessions can cause conflicts.
- Open Command Prompt as Administrator:
- Press Windows key + X, then select Command Prompt (Admin) or Windows Terminal (Admin).
-
Type the following command and press Enter:
net use * /delete
- This command will delete all current network connections.
- Try reconnecting to the network share manually.
Step 4: Check Your Network Sharing Settings
Ensure your PC is properly configured to access shared resources:
- Go to Control Panel > Network and Sharing Center.
- Click on Change advanced sharing settings on the left.
- Under your current profile (Private, Public, or Domain), make sure:
- Turn on network discovery is enabled.
- Turn on file and printer sharing is enabled.
- Scroll down and ensure Use 128-bit encryption to help protect file sharing connections is selected.
- Under Password protected sharing, decide if you want it on or off (this depends on your network security requirements).
- Click Save changes.
Step 5: Update or Reset Network Drivers
Outdated or corrupt network drivers can cause authentication errors.
- Right-click Start, select Device Manager.
- Expand Network adapters.
- Right-click your network adapter and select Update driver.
- Choose Search automatically for updated driver software.
- If no updates found, try right-click and select Uninstall device.
- Restart your PC, and Windows will reinstall the drivers automatically.
Step 6: Synchronize Your System Time and Date
Time mismatches between client and server can cause authentication errors.
- Right-click the time in the bottom-right corner of your screen.
- Select Adjust date/time.
- Toggle Set time automatically and Set time zone automatically to On.
- Click Sync now under Synchronize your clock.
Step 7: Check Domain and User Permissions
If you’re on a corporate or domain network, ensure:
- Your account has permissions to access the resource.
- Your password isn’t expired or locked out.
- Your domain controller is reachable.
Contact your system administrator if you’re unsure.
Step 8: Modify Local Security Policies (Advanced)
If none of the above works, adjusting local security policies related to network authentication may help.
- Press Windows key + R, type
secpol.mscand press Enter. - Navigate to Local Policies > Security Options.
- Locate the policy Network security: LAN Manager authentication level.
- Set it to Send LM & NTLM – use NTLMv2 session security if negotiated.
- Restart your computer.
Final Tips:
- Always keep Windows up to date with the latest patches.
- Restart your router or switch if network shares are managed through one.
- If you recently changed your password, update it on all devices.
- Use strong passwords to maintain network security.
Conclusion
The ERROR_86 can be frustrating, but with a methodical approach, it’s usually straightforward to resolve. By verifying credentials, clearing cached data, resetting network connections, and ensuring proper network and security settings, you can get back to smooth and secure access in no time.
If you still have trouble after trying these steps, consider reaching out to your network administrator or a professional technician for advanced diagnostics.
Did this guide help you fix ERROR_86? Feel free to leave a comment or share your experience below!
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