I have a similar problem. For some reason, at some time, 2 of my computers
(both XP Pro, both wireless) failed trusting my domain (NT 4.0 sp6) which
they had been on for years. I had recently installed McAfee VirusScan Plus
2007 on one of them (which also housed my web server which stopped serving
right about then).
A few days ago, I tried to set up a share on the webserver. I was asked for
domain admin credentials, which I gave. I was told the password was wrong. It
wasn't. I tried several, all domain admins, all of which can log into other
computers.
Yesterday, I tried to get to an existing share on that server and was told I
didn't have permissions. I checked the share and noted that all my domain
accounts were not in it anymore. My share permissions had actually been
changed.
Today, I went to compare that to what was going on on my XP laptop, which
has had McAfee for a year now. And voila, the same problem. Domain
permissions were gone from the shares and I couldn't add them.
So I go to my NT server box and check Server Manager. I'm told for both of
those computers that "The trust relationship between this workstation and the
primary domain has failed."
I uninstalled McAfee. After much finagling (removing it from the domain,
adding it to a workgroup, and adding it back to the domain, rebooting between
each), I finally got the webserver back on. I had actually tried changing
its name, to which it replied that it was it's original name and put it back
on the domain.
I tried the same with the laptop. To no avail. I've removed it from Server
Manager. (It never actually leaves the list.) I've set it to workgroup.
I've readded it to the domain, both via Network Identification on the laptop
and Server Manager on NT. Repeatedly. I've changed it's name. Same thing:
trust relationship failed. I've tried restoring from a restore point. The
only one I had was from 4:15 this morning. I tried it. It still won't trust
the domain to which it belongs.
Any help? (I studied MCSE courses under NT 4 but 1) it's been a long time,
and 2) I only took half the tests before deciding I didn't want to be a
network admin. I am, however, an MCDST. I've been working in tech support
for 8 years. I'm at a loss at the moment.)
--Gabrielle