System Error 1326 has occurred Logon failure: unknown user name orbad password.



C:\> net use Z: \\compname\share /user:administrator
The password or user name is invalid for \\compname\share.

Enter the password for 'administrator' to connect to 'compname':
System Error 1326 has occurred
Logon failure: unknown user name or bad password.

Hi! I was having this exact same problem and I was beating my head
against the keyboard trying to solve this. Here's what I tried before
I found my solution:

- Disable the firewall
- Ensure that the share works on another comptuer
- Run 'secpol.msc' > Local Policies > Security Options > Network
Security: LAN Manager authentication level > Send LM & NTLM - use
NTLMv2 if negotiated

No avail! I could not get this working. But then I remembered! I just
reset my BIOS battery! My date was complelely wrong... I think I set
it to the year 2025 (just messing around). So setting the year back to
the current year (2009) made all the difference for me in this
scenario. Hope I save at least one soul out there in cyberspace!


Jun 23, 2011
Reaction score
You just saved my soul with this post.
I worked for a few days now on this problem, and the date of the other pc was just one day in the past.
Thank You, Thank You, Thank You


Thank you so much, I was close to tearing my hair out! :)

Thank you for the post, it work for us. Brand new Dell Latitude with the bios date and time incorrectly set.




Thank you so much,
You helped me a lot and I appreciate you.

in my case I was able to connect to remote computer via "Remote Desktop Connection" but was not able to connect to share folders. every thing was OK except the time which has been changed by one of my colleagues.

cheers to you

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