Hey all, got a couple of questions. First of all, bit of back story - bought the iMac (27" i5) on 26/11 last year. Been absolutely perfect up until today. Woke up this morning to find it was very unresponsive, some applications had quit and the Finder wouldn't respond. I thought it was an abnormality so I hard rebooted it and carried on as normal. Later in the day, sat down at the computer again to see an error -50 from iTunes saying it couldn't save a library file or something. Every time I clicked 'ok' it just popped up again. Then everything stopped responding again as before. Following a hard reset again, I thought to check disk utility and it shows the SMART status of my drive as FAILING. I've booked a genius bar appointment for Saturday and hopefully they will sort everything out for me however; a) I've installed an additional 4GB of RAM, now should I remove this before taking it to the Apple Store? and b) I have ALL my music/photos/documents backed up via Time Machine to my external drive - will I be able to restore all this safely (if they replace the drive with a new one) from just the Time Machine backup or should I make additional backups? Thanks for any help!