Hi All, I had OS X 10.5 installed on my Acer Aspire One AO753 with a guid partition. I have now erased the drive and formatted the drive with a MBR partition to install Windows 7 back on and it will not boot into the Windows 7 DVD and I cannot access the bios . When I try and boot from the Windows 7 DVD nothing boots and the DVD stops spinning. When I press F2 to access the BIOS it just says please wait and then nothing ever happens. I have tried disconnecting the battery for 30mins and then trying the above all over again and still no joy. Does anyone have any idea how to fix this please? :cry: Many thanks Garry