Hi, in brief, have a A150 (160gb hard drive) which has had XP & OSX running perfectly since installation a few months back. Switch the machine on yesterday and have problems. Didn't do anyting to cause them the day previous :evil: Tried the ACER recovery option, which ends up formatting C: it finishes OK, then restarts and I'm back to square one again. It just wants to repeat the cycle. I even tried booting from a "back up OS disc" (forget exact wording) and it won't recognise the XP disc :( Using the iDeneb OSX installer I've managed to format the whole hard drive (no biggie as no longer need OSX on there). Connect up external DVD with the retail XP Pro disc in, boot from it and get CDBOOT: Couldn't find NTLDR After a few hours searching on google and creating a ISO of NTLDR and (I think) intallling it, I still have the same problem, I've updated the BIOS to 3309 correctly so am now stuck totally. Just want to install XP again. Can anyone share any tips/advice. Just need the machine to recognise and boot from the CD and everything should be fine. Thanks.