I had one of those pop-up Software Update boxes appear urging me to download security updates for osx, itunes, backup and the like. Normally I ignore these things - if it ain't broke... - but this time I agreed, downloaded the stuff as advised, restarted the computer when prompted, and now the os won't start properly. First time I got my desktop with a spinning rainbow cursor, which hung around for half an hour so I switched off, and all i got when I switched back on was a blue screen with a cursor that moves, but no desktop, menus etc.
Tried booting in safe mode, tried resetting pram, tried resetting open firmware, tried reinstalling osx from disc (twice) with the archive and install option. Same problem, except the desktop picture is back, spotlight icon appears in the corner, but no menu bar, toolbar, dock, etc...
...and no, I didn't back up first (shoot me now), so I'd appreciate a solution that doesn't involve losing all my data if at all possible!
Any thoughts gratefully received
Thanks for reading