UPDATE: Managed to boot Leopard by holding down the option key while booting up. Now I want to know how to install windows 7 without getting the same error! Here`s the deal... I downloaded Windows 7, installed bootcamp and partitionned 8GB to windows, on my 2.0 UB macbook. I burnt the ISO image to a DVD and followed the steps to install windows. My computer reboots and leads me to a: `Windows is loading files` screen which stays for almost ten minutes. After this, I get: Windows has encountered a problem communicating to a device connected to your computer. (Please note I have NOTHING connected to my computer) This error can be caused by unplugging a removable stoage device such as an external USB drive while the device is in use, or by faulty hardware such as a hard drive or CD-ROM drive that is failing. Make sure any removeable storage is properly connected and then restart your computer. If you continue to receive this error message, contact the hardware manufacturer. Status: 0xc00000e9 Info: An unexpected I/O error has occured Someone please tell me I can fix thid without losing all my files on my hard drive!