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Possible Duplicate:
Remove administrator password?

Is there any sane explanation for a client's Acer Aspire 1 netbook, running XP Home SP 2, suddenly starting to ask for a login password at boot? He has a strict policy of not using passwords, and I removed his login password weeks ago. The story is that suddenly this morning, for the first time, it is asking for a login password.

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marked as duplicate by Tom Wijsman, studiohack Mar 14 '11 at 20:16

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

I once saw this after installing some optional .NET Framework components through Windows Update. – Arjan Jan 25 '10 at 12:12

Perhaps you added another user. This will cause it to ask for a password. It might be a hidden user.

Try using (WIN+R)

control userpasswords2

To see if anything unusual is there, and you can also make sure the "users must enter username and password to use this computer" box is unchecked.

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+1 hate this option for a security perspective, but correct way of doing it! – William Hilsum Jan 25 '10 at 12:59
I can't use Win+R if I can't log on. – ProfK Feb 13 '10 at 8:05
up vote 1 down vote accepted

I solved this using the Offline NT Password & Registry Editor. This tool is a lifesaver in situations like this.

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