Just bought new w/10.6 Snow Leopard. Cmptr store transferred my old files. When home booted fine. Tried to download updated Firefox + other items = said I had not authority to do so. Transferred all desk top icons to trash. Tried to empty trash = said I had not authority to do so. Checked accts for locked security, etc. Reentered my codes = still no change. Tried to shutdown = no luck. Force quit all items and manually unplugged. Boot back up to Apple icon and twirling icon = nada for anything else. Tried the option key/boot; option/command/P/R boot = SAME.
HELP!!! Thanks so much for anything!!!

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