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I did a backup on my MacBook Air as I had lost admin rights and thought my best option was to carry out a reinstallation with the original disc which I obtain on purchase would assist.

When done, I loaded the updates etc, all was well until I restarted after some updates.

I lost admin rights so only had limited access as visitor, cannot go back to reload the software as keeps asking admin password.

Took my mac to BTOption supposedly Apple Authorized Service Provider (info@btoptions.com) in Colombo Sri Lanka, they are as stumped and as lost as I am, any suggestions greatly accepted.

They say I need the firmware password to reinstall the system.

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If there is a firmware password, you are going to be severely restricted from running any maintenance (single user mode) boots or booting from another drive to fix things up. Hopefully, you can boot into single user mode to fix permissions or just make a new admin account –  bmike Oct 9 '12 at 12:05
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2 Answers

Learned something new today: You can break the firmware password with help from Apple.

http://reviews.cnet.com/8301-13727_7-57542601-263/efi-firmware-protection-locks-down-newer-macs/

This note says that Authorized Service Providers are equipped for that? http://support.apple.com/kb/ts3554

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A Google search reveals this page, which lists several possible fixes.

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Thanks for your response `im going to collect my mac from BTO as it seams they are giving up the reason why i tied to re load was the audio was not functioning. Would appreciate more assistance when I try and re load again as per your advice –  John Elwyn Jones Oct 10 '12 at 5:24
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