Hi; I ordered the recovery disks from Acer for my Aspire One A150 as my grandson had installed linux on my machine without my knowledge and I am trying to get it back the way it was. when I put the system disk in it works fine, then I put the recovery disk in and it says it is going to partition the hard drive - i then get the following error message Oxf0000051 and it tells me to restart my computer. I do this but all that comes up on the black screen is grub> and I don't know what to do. I really need this computer by the end of this week so am hoping someone out there can help me. thanking you all in advance Cecile