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Daniel, Mac Genius
Category: Mac
Satisfied Customers: 4770
Experience:  Apple certified on desktop and portable, help desk qualified. Have owned and used Macs since 1989.
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I had an iMac with Tiger, 2.4 processor and 1G ram. Purchased

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I had an iMac with Tiger, 2.4 processor and 1G ram. Purchased 4G Ram, installed it. No problem. Purchased Snow Leopard. Installed it. No problem. Used disc utility to erase (zero out) Mac HD. No problem. Re-installed SL. Migrated data from Macbook Pro. Now, SL registration will not allow continuance past final question page and admin passwords form Macbook Pro do not work. What's up?
Hello, my name is Dan.
I will do my best to help you, the only stupid question is the unasked one.

Do you have the MBP backed up with Time Machine?
If not then I suggest reinstalling SL without zeroing the drive.

I have done what you are doing and have had this issue myself, if the MBP has a different version of OS X (older) it may've some problems.
Reason I suggest reinstalling SL is it will overwrite the files that are having the issue.
Let me know if it helps, there may be other things to do.

Customer: replied 3 years ago.

Same issue if the MBP software is newer?


New to old may have issues with system files.
This is what I use as a reference guide.

It has going from Tiger to Lion but not from Lion to SL. That can be problematic.
I would try from a Time Machine backup, that should bypass the issue.

Daniel and 3 other Mac Specialists are ready to help you