You probably déjà know this, mais bear avec me.
Computers have passwords in AD, juste like users. We ne know our computer's password, et it changes regularly via built-in logic.
The short answer is that le computer's password is no longer valid, et therefore AD ne trust this machine for logins tout more.
Why? How? Lots of things cause this. Something interfered avec le password change process, ou caused le machine to revert to an old password. Possible culprits include:
Restoring depuis backup.
Being powered off long enough for le password to expire, followed by network issues.
General intermittent network issues avec poor timing.
Viruses, malware, etc.
More things that ne sont pas occurring to me at le moment, probably.
J'espère that helps.
