Administrator's password doesn't work.

Hello.
As the only user I have only set one password during installation. This has worked to install applications as I understand it should - untill yesterday. Now I get an error message:
"Type an administrator's name and password to make changes to Finder"
I followed the instructions to reset the password by booting with the install disk and still get the error. Seeing the instructions in
http://discussions.apple.com/thread.jspa?threadID=742332&tstart=105
I looked at NetInfo Manager. There is no "admin" group but a "bill" group which is the short name I had set. It accepted the password to make changes but gave a message that I was not authorized to add a group.
So, how do I get this working again, preferably without single user terminal commands? I would appreciate any help.
Bill
PS: I haven't figured how to search for only answered topics. Including "This question is answered" didn't work.
PowerMac G4 Mac OS X (10.4.8)

Thank you, J D. I tried that. After "passwd admin [return]" there was another prompt.
I typed "passwd admin (password) [return]" and there was a brief outline of syntax.
I typed "man passwd [return]" and saw that it was supposed to respond with a request for the old password. This didn't happen.
So I rebooted and got the same error message when attempting to install an application.
Is there a way to disable this password business. I don't need it and I am now confronted by a machine that has turned on its owner.
I would appreciate any help and soon before I loose the faith. ; )

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Someone please help me with this!!
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Type: XT940UT#ABA
Operating System: Windows 7 Ultimate
BIOS Version: 68AHHH Ver.F.20
SM BIOS Version: 2.6
Hardware Extraction Layer: Version 6.1.7601.17514
This question was solved.
View Solution.

once you log a support case with HP customer care, they will provide you once utility and steps to run it. which can capture the UUID. BTW- UUID is a unique ID for each machine (16 or more digits) stored in BIOS itself.
Once the utility results(UUID and other info) in the log file, shared with HP. they can generate a key file(SMC) to reset.
well, Technical support depertment can help you in it, no need to ask for any specific person or department.
hope it helps.
Regards,
WW
“I am an HP Employee“
***** Click the KUDOS star on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem***

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