bizarre login lockout problem

I am the only Vista user in our company. Other than me, it's all XP or
2000.

I "upgraded" my XP system to Vista, and all seemed to work OK. Minor
compatability issues, but not too bad. All using my main domain user
account. Then we moved the computer account to the main domain.

The machine account had been in our own software development domain,
but Sophos wouldn't update in that condition (only a problem on
Vista), so the account was moved and Sophos was happy. All went
swimmingly well.

Then it came time for the periodic password change. All of a sudden my
account was locked out every morning when I powered up. We changed the
password back to what it was, but to no avail.

Now every time I start the machine and try to log in, the account is
locked out and I have to wait 15 minutes for the lockout to expire
before I can get logged in to the domain. Our MIS department has
checked, and my domain account is fine up until I switch my Vista
machine on, and during the startup process, they see 8 failed login
attempts, then the account is locked out.

I have checked the machine an find no saved passwords in the user
account manager. The machine account has been deleted from the old
domain - this made no difference. Our MIS department don't have the
tools to find out what program is making the failed login attempts.

Can anyone suggest where I might look, or sugest a course of action
for resolving this mightily irritating Vista feature? No other machine
on site has reported any such problem, just my Vista machine.

At the moment, Vista would get deployed over the lifeless corpses of
our MIS department, they're sick of dealing with this problem that
afflicts only "early-adopter" Bob.


--
Bob Moore
http://bobmoore.mvps.org/
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