This weekend I bought my MacBook, Parallels and Windows. I keep getting a message that says "no booting device available" and "The file acpi.sys is corrupted". Also, when instaling Windows after I go in the Resources and make sure things are checked off etc. I am suppose to choose "Defaut CD/DVD-ROM" from the Devices Menu but it is greyed out (can't choose the option). Can anyone help I am really desperate, thinking about returning everything and getting a pc because I need Windows for work. I am a long time Mac user and really don't want to throw in the towel but I am not able to work. Please help.