username and password incorrect Windows 10 PC

Question

I have a login issue on the domain account Windows 10 workstations. The user login without any issue at first and after a couple of logins they got a username and password incorrect error. my administrator account also not working but I know it is the correct username and password because I can log in to other PCs without any issues. After rejoining the workstation into the domain the user is sometimes able to log in for the first attempt and then got stuck with the same username and password incorrect error. I have assigned a new switch port but still no luck.

Answer 1

Hello

Thank you for your question and reaching out.

1. Disable any Antivirus program or Windows firewall you may have for temporary purpose.
2. Please verify Date/Time should be sync with AD DC.
3. Verify preferred DNS ip Should be of AD DC and you are able to ping using Domain name from this PC.
4. Please check if this Computer object is placed in Right OU and Right Security Group.

--If the reply is helpful, please Upvote and Accept as answer--

Answer 2

Please run;

Dcdiag /v /c /d /e /s:%computername% >C:\dcdiag.log (run on PDC emulator)
repadmin /showrepl >C:\repl.txt (run on any domain controller)
ipconfig /all > C:\%computername%.txt (run on EVERY domain controller)
ipconfig /all > C:\problemworkstation.txt (run on problem pc)

Also check the domain controller System and Replication (DFS or FRS) event logs for errors since last boot. Post the Event Source and Event IDs of any found. (no evtx files)

then put unzipped text files up on OneDrive and share a link.